“Thank you for coming! Oh yes, thank you! You were all wonderful guests!” Nagisa waved her arms, opening several portals for all her guests. This had easily been the best party she’d ever thrown, and she could tell that everyone had a wonderful time. All the guests each gave Nagisa a bow (some even gave a prayer) before returning to their respective realms and worlds. Once they had all left, Nagisa turned to face her subjects. “And none of this would have been possible without all of you! Don’t worry about the mess, I’ll clean it up~” Some of her subjects let out an audible sigh of relief, not that they would mind cleaning for their goddess. They have worked tirelessly the last few days for Nagisa and while they got to participate in the celebrations, they were fairly exhausted from all the work and partying.

Nagisa sat on her makeshift throne of darkness as all her subjects began to disperse to other realms or to some other location in Nagisa’s domain. Except for two of them. A dryad helped push along a cart towards her. The dryad wore a dress that appeared to be made of leaves. Her hair too was indeed made of leaves, and her body was made out of wood. She sported a long tail-like branch that had a small flower at the end of it. She hummed gently as she pushed the cart along.

On the cart was a pot that housed an alraune. She wore nothing as her own leaves, vines, and the big flower around her waist did the job of covering her. Her flower was blue, though her skin and hair were green. The vines and leaves around her body sported a darker color. Unlike her dryad friend, she didn’t have any legs, sporting two long twisty vines that held her up. She was holding Nick’s present within her hands. While not upset, she appeared a little peeved.

“Alright Nagisa, we helped out with the party,” the dryad said. “I think it’s time you change us back.” The goddess of darkness left out a chuckle.
“Oh really? I think you two look cute like that~” Nagisa snickered.
“Lady Nagisa, I never mind what you do to me, but I would like my ability to move around freely again,” the alraune said.
“Oh, but that’s just how life is for an alraune! It’s just something you have to get used to~”
“Nagisa, turn us back-” The dryad began before being cut in on by the alraune.
“Or you won’t get my gift!”

Nagisa let out a playful sigh and snapped her fingers.
“Alright, alright, but only so I can have my gift~” A dark mist covered the two plant girls as Nagisa did her work on them. The mist quickly dispersed, Hiros and Nick now standing where the dryad and alraune had been standing respectively.
“Ah, finally got my legs back!” Nick hopped out of the pot and moved around a little, getting readjusted to having legs.
“Must have been a nightmare for you losing ‘dem legs~” Hiros teesed. Nick gave Hiros a quick glance before turning his attention back to Nagisa.

He walked up to her and placed the box in her hands.
“To be honest Lady Nagisa, you are quite unpredictable at times. Thank you for waiting until now to open your gift,” Nick said. Nagisa didn’t respond and simply nodded. Nick’s gift had been on her mind for the last few days now. Why didn’t he want her to open it until now? What was so dangerous about this… whatever he had for her? Nagisa used her power to force open the box, revealing….
“An orb?” Nagisa picked up the object in the box.

Indeed, it was an orb, covered in a metallic plating on its poles. A strange misty pattern moved and altered inside of the orb, and it slowly changed colors while giving off a faint glow. Nagisa could feel that this object had some insane power to it, enough to rival her own. Her hands began to tremble a little, and she began to sweat. She didn’t sense anything harmful about it… but something about it made her feel unwell.
“Um… Thank you… What exactly is this?” Nagisa asked. She tried to remain cool and hide her slight anxiety.

Fortunately, Nick and Hiros didn’t seem to notice.
“So you got her a plasma ball… thing?” Hiros commented. Nick shook his head.
“I’ve been working on this device for the last couple of months now. I found a piece of some- well, a very powerful rock, I haven’t been able to identify what it is. Anyways, that rock had some great power,” Nick turned to face Nagisa. “Seemed its power could rival that of a god.”
“So… you are giving this to me for safe keeping then?” Nagisa asked.
“Well… sort of. You see, the rock is inside the orb. The orb and the metallic parts of it are my own invention. I was capable of tapping into its power and controlling it. There are some limitations, but I’ll get to them when they become relevant.”

Nagisa calmed down a bit, figuring that Nick didn’t have any ill intent with his gift.
“So that’s why you didn’t want me to open it with others around.”
“Yes, but that’s not the whole story. I want you and Hiros to use it,” Nick said.
“Wait, you want us to use it? Can it be used?” Hiros said with a hint of surprise.
“And what does it even do?” Nagisa began to worry again. This time Nick did notice Nagisa’s uneasiness and gave her a head pat.
“Relax, Lady Nagisa, I have fully tested this. If I wanted to harm you, well, I would have turned that rock’s power into a weapon!”
“And how do we know that this thing isn’t one?” Hiros asked.

“Wow, you wound me, Hiros.”
“Well- yeah, you’re right. Sorry to doubt you.” Hiros seemed confident and approached Nagisa, though the goddess of darkness was still unsure about all of this.
“Lady Nagisa, if you don’t want to use it, just say so,” Nick said, giving her yet another head pat.
“I’m sorry Nick,” Nagisa spoke. “It’s just- I don’t know, I never felt vulnerable before, that’s all. How exactly do we use this?”

“Simple. Both of you grab one of the platings and focus on the orb.”

Nagisa placed her hands on one side and Hiros grabbed the other. They stared into the orb, focusing the strange swirls in patterns in it. A calming feeling and positive aura suddenly surrounded them as both felt at ease. Nick stood back and watched with glee.
“Enjoy your present, you two. Happy birthday~” He said.

Nagisa and Hiros froze. They couldn’t move, nor could they react to what was about to happen. Nagisa began to shiver a little and if she could, she might have squinted or yelped a little. She felt like she was being drained, though she didn’t feel like her life was threatened. The dark-misty aura around her began to fade and her clothes lost all their mystique, becoming… ordinary. Nagisa felt weak, but not even close to death.

The opposite was true for Hiros. He felt a surge of energy enter his body, power he didn’t even know existed. It was intense, if he could, he might have laughed or screamed in joy. The sensation he was feeling was unreal. While Nagisa’s changes were fairly minor, the same could not be said for Hiros. His body began to change to accompany the new power he now possessed.

His hair had grown a little, now to a very familiar short, almost tomboyish long hair. His ears began to grow long, becoming long and pointed. At the tips of each ear, a slight shade of pink and a few flaky scales began to form, though neither Hiros nor Nagisa noticed this. The two didn’t have the slightest clue what exactly was happening, but seeing his face becoming clean, hairless, and… well, perfect, Nagisa knew her dear brother was fast becoming her “sister”.

Hiros managed to let out an audible grunt as he felt pressure below his armpits. The sensation felt familiar and as skin began to push out, he realized he had control over these new limbs, but only for a moment. Instinctively, as his flesh stretched out and a delicate pair of fingers began to grow at the ends of each new arm, Hiros grasped the orb with the new arms he had. That was far from the only change for his torso. His entire body began to grow, both a bit wider and quite a bit taller. He dwarfed Nagisa by a country mile, though he wasn’t exactly giant. His figure with the four arms made him look quite imposing.

Though his upper body began to soften quite a bit. The mass of his body fat began to distribute to other parts of his body, mainly his chest and waist. Hiros’ belly curved in a bit due to the missing fat, giving him a more hourglass like figure. At this point, all of his body hair was nothing more than a distant memory and his skin was soft, tender, and smooth. Again, Hiros managed to let out an audible grunt, well in this case, an audible moan as he felt pressure building up behind his nipples. The fat got to work, pushing out from behind his chest and kept pushing and pushing. Eventually, Hiros possessed a large and ample pair of F-cup boobs of his own. He would have loved to fondle with his new assets, but his arms were firmly glued to the orb.

As this was happening, Hiros’ waist went through different but equally drastic changes. His waist had begun to expand more and more, causing his poor pants and boxers to reach their limit. His pants did indeed break but his boxers held on by a few threads, but even they couldn’t withstand the explosive power of an expanding ass. If only for a moment, Hiros seemed to be able to break free from the trance as he felt his manhood being erased. A soft and slightly wet womanhood took its place, sealing Hera’s fate as a woman.

The massive changes to his body caused Hera’s poor clothes to meet a very untimely demise. Her massive tits were on full display, but fortunately (or unfortunately depending how one looks at it) the remains of her shirt, pants, and boxers came together and began to reform. They reshaped into a toga, and while it nicely covered her waist, it went a bit skimpy upwards. Hera’s multiple arms (except for her top left arm which was slightly covered by a forming cape) were bare, including the sides of her boobs. For modesty's sake, a pair of panties formed as well, though Hera might have preferred to go a bit natural in that region.

The transformation was far from over though. Scales similar to those on her ears began to crawl down from her waist and cover her legs. Hera’s legs wouldn’t remain- at all as they began to merge into a snake-like tail. As the scales crawled down, Hera’s body from the waist down began to grow, and grow, and it just kept growing until she was nearly 30 feet in length. She was a lamia, through and through. But with the power she felt coursing through her veins, Hera knew that wasn’t the only thing she was.

Nagisa and Hera finally escaped the trance, Nagisa falling backward, though Hera stood firm, holding the orb with her hands. Nick ran over to Nagisa and helped her up.
“What just- what happened?” Nagisa said. She didn’t notice Nick’s hand right away as she tried to use her power to help herself up. But nothing happened. “Why is my power not working-?” Nagisa looked up, finally noticing Nick’s kind gesture. How long has it been since someone helped her up before? She took his hand, feeling very uneasy.

“Ara, I must say Nick, you’ve outdone yourself~” The lamia said with a giggle. One pair of arms held up her boobs while her other pair grabbed her chin, as if she was trying to hide her laugh.
“Nick, what did you do to me!?” Nagisa said, not quite angry, but more shocked if anything.
“Well, that device in Lady Hera’s hands is a life swap device,” Nick began to explain.
“A life swap?” Nagisa looked at Nick as if he was crazy. “You mean-”
“Oh yes my dear ‘sister’,” Hera said. “And it didn’t just turn you into a human or me into a goddess. Take a look around at what was once your domain~”

Nagisa began to notice that her surroundings looked very different now. They now appeared to be in a more heavenly like place, the ground they stood on was fluffy clouds and multiple marble buildings were everywhere. Fountains made in Hera’s image dotted the place with a massive statue of Hera hugging what appeared to be the Earth just behind Nagisa. All the subjects remained monster girls, but they all had the same motherly figure Hera had.

“I must say, it was quite surprising to me. If it weren’t for my new found power and knowledge I would see this as overwhelming,” Hera said.
“It’s overwhelming to me….” Nagisa blurted.
“Well of course it is my dear sister, you are mortal after all~”
“But, if we swapped places,” Nagisa turned to Nick. “First of all, why did you do this? And second of all,” Nagisa changed her focus back to Hera, “what kind of god are you? You are clearly not the goddess of darkness, that’s for sure.”

Nick smiled and gave Nagisa a headpat as he began to explain: “I assume being a god is a lot of hard work, so I wanted to give you a day off. Of course, I know I couldn’t really restrict your power and it’s impossible to take it away, so I simply transferred that power to someone else instead. So Nagisa, you are human now and you don’t have to worry about your godly duties. Take this opportunity to relax and enjoy life as an imperfect life form for a change!”

Nagisa blushed at Nick’s words.
“How considerate of you. I mean-” Nagisa cut herself off. “No, it’s fine. Actually, maybe not having my powers for a while might be fun.” She paused for a bit. “Alright, I’ll play along Nick, but just because I’m human now doesn’t mean I’m your chew toy!” Nick and Nagisa laughed while Hera joined in with a slight giggle.
“Lady Hera!” A harpy flew by and gave a letter to the goddess. “I’ve got a message for you on the happenings on Main Character-kun on Droma-3!” The harpy bowed her head and flew off.

Hera quickly read through the letter and let out a small sigh.
“I apologize, but there are some matters I need to attend to,” Hera said.
“Wait, did that harpy recognize you as her god?” Nagisa said, a bit taken back.
“Ara ara my dear sis, I will now answer your second question. It appears that reality has changed with our lives swapping. In this reality, you’re a 21 year old human woman and I am Hera, the goddess of love and motherhood. And from my memory, I’ve been like this for 7000 years~”

Nagisa’s jaw dropped at this realization.
“And, why are you not the goddess of darkness?”
“If I may interrupt Lady Hera, I believe it was something to do with personality. Hera is a very wholesome person and loves MILFs. So, when she became a goddess, that was the type of goddess she turned into,” Nick said. Nagisa looked over at Hera and then to her own hands.
“What does that say about me then?”

“I would love to hang out, but I have other matters to attend to. I will assist you, Nick, with your date with Nagisa~” The goddess said as she snapped her fingers. A portal opened up, leading to a beach. Nick and Nagisa’s clothes had changed to fit the occasion, Nagisa wearing a fairly sexy bikini (though Hera also gave her a shirt to wear), while Nick wore a shirt that said “Ocean City” and some swim trunks to boot. Hera even provided them with some towels, a bucket, a cooler with sandwiches, and all the other stuff people bring to the beach.

“It’s not a date though!” Nick said. Nagisa laughed and was now giving Nick a headpat.
“Unless you want it to be~” She said. The two thanked Hera for her kindness and jumped into the portal. Hera couldn’t help but giggle as the portal closed.
“Ara ara, Nick, I hope you know what beast you just unleashed onto the universe~”

****

A few days had passed since Nagisa’s birthday, and the past few days of being a human had been quite peaceful to her. The city she and Nick were spending time in was relatively quiet despite being a summer hot spot and even when they weren’t spending time on the beach, they had a large variety of shops and arcades they could visit on the boardwalk. She and Nick decided to spend another day on the beach after eating some tasty burgers on the boardwalk. The two were setting up the chairs, blankets, and umbrellas when Nagisa turned to Nick.

“Hey Nick,” Nagisa began. “I want to thank you for your gift. These last few days have been wonderful and nostalgic.”
“Glad you are enjoying yourself,” Nick responded. He sat down and opened a book to read, but then shared a glance at Nagisa. “Wait, nostalgic? What do you mean by that?”
“Oh, well, that’s a story for a different time. You shouldn’t worry about it all too much~” Nick shrugged at Nagisa’s statement and turned his attention back to his book.

Nagisa focused her attention on the ocean, watching the waves rise and fall, children playing near the shoreline, and teens attempting to ride the waves further out. To their left, a sand volleyball court was located and a number of people were starting to gather to play. As their game began, Nagisa looked over at the court and blinked twice at what she saw. Half of the people playing the game were monster girls, very busty monster girls at that. “Strange,” she thought. “I don’t remember demihumans being native to Earth. When did- wait.”

A smile began to creep up on her face as she realized what might be happening.
“Excuse me,” a voice said from behind Nick and Nagisa. They turned around to see a strange looking woman, covering herself up with some kind of cloth. Nagisa became suspicious, but Nick for some reason didn’t seem to mind very much. “We need one more person to even out the volleyball teams.” She tapped on Nick’s shoulder. “Would you like to play handsome?”
“Of course!” Nick said cheerfully. He placed his book down and ran up to the volleyball court, though Nagisa nor the woman didn’t follow.

“Who are-” Nagisa paused, but then smiled. “Hera.” The mysterious woman giggled and a pink mist engulfed her. When it evaporated, Hera stood there, four arms, lamia body and all.
“I’ve been quite busy myself dear sister. Ara, being a goddess is a lot of fun actually, but also a lot of work,” the goddess of MILFs said as she stroked Nagisa’s hair.
“So, what brings you here?”
“Ara ara, I wanted to make your vacation a bit more interesting~” Hera titled Nagisa’s head back in the direction of the volleyball court. “Watch~”

Nagisa noticed all the remaining men on the court starting to change, but she kept her focus on Nick, knowing Hera would likely give him the more interesting changes. Nick’s hair had begun to grow straight down, growing longer and longer until it was nearly touching his butt. Nagisa noticed that his hair turned into a milky white from around his shoulders though most of his hair remained brown. Nick had reached the side he was playing on and Nagisa could see his face was now incredibly feminine, on top of his skin being spotless, hairless, and almost perfect (but not as perfect as Hera’s~).

 The game began, though all the people playing didn’t seem to notice the changes nor did they care.
“I see you’ve mastered the ability to manipulate one’s mind,” Nagisa commented. Hera giggled a little and nodded.
“I can see why you find it entertaining to do,” Hera replied. Nick managed to hit the ball and started a good volley. The changes seemed to slow down a bit, but that was all a part of Hera’s plan. She waved her hand, manipulating the trajectory of the ball, making sure it would smack Nick’s chest.

Nick let out a yelp, but he wasn’t in any pain. He managed to bump the ball back with his… massive boobs that formed on his chest. They bounced and jiggled all over the place, but their large size didn’t do his shirt any favors. Unlike Hera during her transformation, his rack wasn’t even close to being exposed.
“How do you like those mooooves~” Nick said, his voice cracking a bit as they became higher in pitch. His belly had lost most of its tone and fat as much of that went to his chest.

“So Hera, what kind of monster girl will he become?”
“Ara ara, only what I consider the queen of MILFs~”
“But you are the queen of MILFs!”
“Oh hohoho! No dear child, I am the goddess of MILFs, I rank galaxies higher than anyone!” Some less than human changes began to take place on Nick’s body. A pair of horns pierced through his hair, though they only added to his cuteness. On top of that, his ears began to grow longer and became fairly droopy. It took a moment for Nagisa to process, but she smiled now knowing what Nick’s fate would be.

Hera couldn’t help but giggle as she flicked her wrist, making sure the ball now hit Nick squarely on his crotch. As it did, Nick let out a very loud and feminine “moo” though it sounded more pleasurable than painful.
“Hmm, those clothes don’t suit you Nicole~” Hera thought out loud. Nicole’s shirt began to repair and reform as it changed into a bikini top that left little room to the imagination. The “Ocean City'' text of his shirt and the general design of the shirt remained on her bikini. Likewise, his swim trunks which were not enjoying the large ass and expanded waist Nicole had began to reform into a matching bikini bottom. Nicole was now a woman through and through, but there were still many changes to be made.

Fur began to grow all over Nicole’s legs, its color matching that of her hair. It was mainly brown, but various white spots were scattered throughout. Nicole’s feet turned black and appeared to harden. They reformed and contorted in strange ways as they became hooves, much fitting for a minotaur. Lastly, a tail sprawn up just above her ass, completing her transformation.
“And now for the fun part~” Hera laughed.
“You mean that wasn’t the fun part?”
“Ara, you are right, Nagisa. I should say this is the ‘best’ part~”

Hera snapped her fingers, lifting the mental trance she placed on all the former men now monster girls. They all froze for the sec, and the still airborne volleyball knocked out a poor harpy midair. Nicole ran up to the harpy and helped her up. The new minotaur was obviously bewildered by all of this as all of them were. Surprisingly, they all seemed to not mind the changes with a few showing off their new amazing bodies. Nicole turned her head to look back at Nagisa, the minotaur’s face filled with bewilderment. Hera and Nagisa waved to her, and Nicole couldn’t help but laugh.

She waved to the monster girls as she ran back to Nagisa.
“I shoulda figure y’all do this to me,” Nicole said. She now had a fairly southern accent and tic.
“Ara ara~ Nicole, did you really think that making me a goddess wouldn’t result in this?” Hera said.
“Well, I’d thought ya done me worse!” The three girls laughed together.
“You guys are too much!” Nagisa said.
“Don’t ya mean ‘y’all girls are too much’?” Nicole chimed in causing them to all laugh even harder.

Hera scratched Nagisa’s head with her four arms.

“Did you enjoy your birthday present, dear?” Hera asked. Nagisa smiled and nodded.

“Yeah! Thank you guys, I haven’t had this much fun in a long time!”