[Granada Sky (Mogiki Hayami)] Teiou no Tanoshimi [mysterymeat3]

A imperious dark-haired beauty keeps her companion Suiren transformed—chest enlarged, face painted, utterly obedient—until young Toma stumbles onto the truth that Suiren was born a man and panics at how badly he wants what he's seen. She wastes no time weaponizing the boy's discovery, taunting him about his nightly habits while putting Suiren's plush, made-up body through its paces right in front of him. Between Suiren's shameless moans and Toma's mortified arousal, the real entertainment is watching who ends up more corrupted by the end.