NTR Deep Cervix Domination: Busty Girlfriend Gets Vanilla Sex 5 Days a Week With Her Boyfriend, the Other 2 Days Her Boyfriend's Friend NTR-Trains Her Cervix Into a Sex-Crazed Psychopath — Hachimitsu RinFNS-110

A NTR tale sparked by bragging to his best friend: "I have sex with my girlfriend 5 days a week." The best friend, a psychopath at heart, thinks, "Those 2 extra days are a waste" and "I'll boost her sensitivity for my friend's sake." Rin is confused but goes along, and after having her cervix developed, she becomes hooked on unprecedented vaginal orgasms...