I Woke Up and Became a Girl

A male student named Futaba Hinata wakes up transformed into a woman with enormous breasts. An AI identifies it as a one-in-hundreds-of-millions condition; he still attends his all-boys school in a male uniform and is stared at for his chest. On day one classmates grope and suck his breasts after he offers; by day five the class has bought him a girls' uniform and he lifts his skirt to show panties and genitals as a service, and alone he masturbates to orgasm for the first time as a woman. On day seven he invites a male classmate home; after kissing and fingering they have intense vaginal sex in multiple positions with repeated climaxes, including seated penetration while the classmate grips her buttocks as fluids drip. Narration concludes that Futaba Hinata became a “woman” by doing this.