Sam had just returned from his early morning jog, sweat still clinging to his skin as he kicked off his shoes by the door. His throat burned with thirst, and he headed straight for the kitchen, tugging his damp shirt away from his chest. Yanking open the fridge, his tired eyes spotted a tall cup filled with a shimmering pink liquid. It looked refreshing—probably just pink lemonade. Without thinking, he grabbed it, lifted it to his lips, and chugged it down in a few greedy gulps.

But almost instantly, something felt… wrong. The liquid left a strange warmth in his chest, almost like fire spreading beneath his skin. Sam groaned, clutching at himself as the warmth bloomed into a pressure—then a sudden, swelling force. His pecs pushed outward unnaturally, stretching the fabric of his shirt.

“W-What the hell?!” he gasped, stumbling back against the counter as his chest ballooned. His muscles softened, flesh rippling and jiggling until, with a sharp pang, he erupted into curves. In seconds, his flat masculine chest had transformed into a pair of heavy, sensitive, bouncing double-D breasts.

Sam’s eyes went wide with horror as he cupped them instinctively. They were warm, impossibly soft, and so heavy in his hands. The pressure inside them only grew worse. He squeezed in panic, and with a shocking spray, thin streams of milk squirted from his nipples, soaking his shirt.

“God—no, no, no!” Sam cried, trying to press them down as if he could force them back into his body. Each frantic squeeze only made more milk leak out, leaving him trembling and humiliated. His breathing grew ragged, his heart racing as the realization sank in: this wasn’t stopping.

That’s when Amy rushed in, drawn by the sound of his panicked shouting. She froze in the doorway, eyes widening in disbelief as she took in the sight—her athletic boyfriend standing in the middle of the kitchen with swollen, lactating breasts straining against his shirt.

“Sam… oh no…” Amy whispered, her hand flying to her mouth. The color drained from her face, horror mixing with guilt.

Sam turned toward her desperately. “Amy! What’s happening to me?!”

Amy didn’t answer at first. She knew. She recognized the faint shimmer of the liquid clinging to the rim of the cup. Her stomach sank like a stone.

“I—I left my serum in the fridge last night,” she stammered, her voice shaking. “I spent hours making it… it was supposed to be for me. I just wanted… I just wanted bigger breasts.”

The room fell into a stunned silence. Sam’s breathing came in shallow gasps as his new chest heaved, still warm and swollen with milk. Amy’s eyes darted over him, full of guilt and fear.

Now they were both left with a single terrifying question: what were they supposed to do with Sam, a man who suddenly bore the heavy, milky curves of a woman?