This story is a sequel to Magic Self-Bondage Mishap: Enchanted Chains. If you haven't read it, it may be advisable to do so first.

Disclaimer:
This story contains elements of bondage and lesbian tendencies.

Amelia looked at the clock. It would still be a few hours until her roommate would return from her afternoon classes. Plenty of time for her to enjoy herself.
It had been a few weeks since the raven-haired magic student had attempted to use said magic in more... debatable ways. Her mentor, Miss Sivillia, had gotten wind of it and had turned it against her. She still remembered her punishment vividly, could hear Miss Sivillia's anger in her voice and, even worse, her disappointment and could feel her ass cheeks burning from the spanking she had gotten. Additionally, she had moved her into a single room with a classmate. Not only to watch her but for her own safety as well, the young teacher had assured her, due to her recklessness.
Keyla, the girl she was now sharing a room with, was a little strange but Amelia didn't mind her presence. In fact, they did get along well. But for what she wanted to do right now, she didn't need her around.
Amelia retrieved a small box from under her bed. Inside, there were rolls of duct tape, a red ballgag and a pair of handcuffs. Amelia had purchased these items during her recent holidays and had made sure to hide them from everyone. She didn't want to rely on magic anymore, after it had backfired last time. There was a simple command spell on the cuffs that made it easier for her to close them and would also let her open them if she couldn't reach the key. It was nothing too complex. This way, she would be in control the entire time. And the key would be close to her the entire time anyway.
Losing no time, she put the items on her bed and looked down at herself, thinking about her clothes and hair. Her black curls were falling over her shoulders, framing her face. She decided to tie them in a bun and looked around the room for a hair band, spotting one on Keyla's side of the room.
She won't mind if I borrow it. she thought and grabbed it to style her hair.
She kept her glasses on, another precaution she found to be invaluable after last time, and ran her hands over her uniform. It consisted of a white dress shirt, dark-blue necktie and a short black skirt. She also had chosen to wear dark tights. The black blazer was lying on a chair at the end of the bed. She took off the necktie and opened the top button of the shirt before getting to work.
Lying on the bed, she put her legs together and started wrapping them in tape, using magic to let the roll circle her legs as they held them up. After just a few moments, her calves were wrapped in a silver layer and she quickly repeated the process for her thighs. Trying to move her legs, she immediately felt how useless the attempt was. She bit her lip as a warm feeling started to form in her. Later, when she was done, she would be able to use the same technique in reverse to unwrap the tape again.
She bend her legs and sat up, taking the gag and slowly pushing it behind her teeth. A moan escaped her as she closed her lips around it and gently bit into the rubber after having secured the tight strap.
Next was the tape again. She stuck the end to her shoulder and started moving it with magic again. Holding her arms to the sides and just moving her index finger to guide the roll, she had it wrap around her torso, above and below her breasts, pinning her arms to the side. She separated the roll and let it drop down next to the bed and reached for the handcuffs and keys behind her. The keys were there, well in reach. Reassured, Amelia closed the cuffs lightly around her wrists and activated the command spell to make them close tightly on their own.
She dropped to the side and took a deep breath, carefully stretching and struggling, feeling the tight wrapping holding her captive. Already she could feel herself getting wet. She closed her eyes and imagined a situation in which someone was holding her captive, getting into the mindset and conveniently forgetting she control she had over her bindings. She struggled and turned, moaning and whining behind the gag.
The student wiggled for a long time, trying to escape the grip of the tape and the strong arms of her imaginary mistress, secretly enjoying the predicament. She could feel her panties getting soaked and the fabric of her bra stretching over her hardened nipples.
A key turned in the door.
Amelia stopped and listened. This wasn't right! Keyla was the only other person to have a key to the room and she was supposed to have afternoon classes! Had she really forgotten the time and been tied up for hours!?
The door opened and her roommate stepped in. Keyla was taller than Amelia, but that wasn't anything new, Amelia was shorter than pretty much everyone else her age. The girl's hair was a very light blonde, almost white, and kept in a short braid. Her skin was very pale her ears were slightly pointed, betraying a non-human heritage, but her overall appearance was was very friendly and inviting. Amelia had always been a bit jealous about how she could eat as much as she did and still retain her killer figure.
"Oh, so you are here, Amy!", the girl chirped with her usual friendly tone, letting the door fall shut behind her.
Amelia stared up at her. The shock of having been caught was still fresh, but it was even more shocking that the blonde did not seem shocked at all.
"I just forgot something, I'll leave you be in a second~!" Keyla walked over to her desk and grabbed a book, before turning to the door to leave again, but stopping halfway and looking back at her dark-haired friend, tilting her head. "Say... is that my hair band?"
"Nnh?" Amelia wouldn't have had an answer, even if she had been able to talk. That was what she took from the situation!?
Keyla quickly walked up to her and pulled the hair band away, letting Amelia's hair fall over her back and shoulders.
"I don't mind sharing stuff, but you gotta ask me first. Hm?" She grabbed Amelia's shoulder and forcibly turned her on her stomach, despite muffled protests. "That's not very secure, is it?"
Amelia could hear the keys jingling and the cuffs opening a moment later. To her further surprise, however, she felt the blonde's strong grip on her wrists next. From the corner of her eyes, she could see her bend down and pick up the tape.
"Whrm hrm hmm dhmmg!?" she tried to ask and struggled, but her roommate was far stronger than she looked.
The tape quickly wrapped around her forearms and wrists, before Keyla forced her to close her hands into fists and wrapped tape all over them as well.
"There we go~!" she chirped, giving Amelia a playful slap on the ass. "You're welcome!"
The steps moved back towards the door.
"I'll check on you later, kay!?" The door slammed and the key turned in the lock.
It took a little while for Amelia to get over what she just experienced and to sort out just what had happened. A creeping feeling of dread came over her as she carefully tried to undo the winding with magic. It didn't work. Of course it didn't, she needed a finger to guide the tape, but she couldn't even move those! She was trapped! Again!
Amelia moved her arms as much as she could, which wasn't a lot, trying to get free somehow, but Keyla had done a very good job. She didn't have a choice but to wait for her to come back.
Helplessness and a slight panic set in, making her struggle and mumble protests and curses, but nothing helped. Somehow, her foolproof setup had backfired once more and left her at the mercy of her roommate.
And it made her so unbearably horny.