An injection

"I suppose you're wondering what your punishment is going to be...it's this." With that, the redhead produced a syringe, filled with something murky-green and ominous looking.

I blanched, wondering what the hell she planned to inject me with, but with my wrists manacled in place, I couldn't exactly do much about it.

Seeming my apprehensive expression, she smirked, stepping closer. "Don't worry, it's nothing too harmful. There's a version for the winners too, though the effect is different."

She lifted my sleeve, pressing the syringe tip to my arm and smiling condescendingly. When I opened my mouth to protest angrily, she cut me off with one delicate hand, muffling my voice.

"The one here is BMP-115. It's a specially developed mutagen for males who lose our contest. It has a number of effects, reducing aggressiveness and making subjects more subservient and less competitive. On top of that, it has an effect on pheromones, making it easier for women to recognize the subject as a beta male."

I grunted in discomfort as she stuck the needle in, then felt a heavy, unpleasant sensation slowly spread throughout my body. Everything was gradually going dark as my body struggled with the injection.

"I think Sally will like you better this way. She always wanted a submissive, eager to please husband. Now she'll have Rod when she needs a rough pussy-pounding, and you when she needs a submissive hunk to tend to her needs."