[Yasemura lo-ru (Teishoku, Toyono Kitsune.)] Majime na Kimi ga Nyotaika Sarete Reikoku Akuin no Maso Sadist ni Mezame Saserareru Manga ~Oni Tsuno Chou Kyoushi~ [Full Color]

A serious, straight-laced soul is feminized and remade as a masochistic rubber doll, sealed in a glossy latex bodysuit that secretes aphrodisiac, stretches pierced nipples for penetration, and swells a sensitive futanari cock with every pulse of arousal until pleasure becomes addiction. Guided by a cruel, horned trainer-sister with swelling breasts straining against her own suit, her mind breaks open to lustful submission as she begs to be fucked and trained, torn between shame and ecstasy. With training complete and no escape for the poor thing, she is left to remain forever in a world of darkness where despair and overwhelming ecstasy dance as one.