While keeping her boyfriend in the dark, innocent and inexperienced Risa enters the adult video industry, convinced that only a professional adult film actor can make her climax for the first time. For her, everything is completely new—having sex in front of another man, being filmed on camera, bareback sex, and using sex toys. With pure and naive determination, she experiences her first ecstasy through intense stimulation with dildos, vibrators, and electric massagers. Even as she cries out "Stop, stop!" midway, she repeatedly reaches orgasm after orgasm. Touched by a professional actor, she's surprised by techniques far different from her boyfriend's (her first sexual partner), and performs an innocent blowjob even as her anus is licked. Overwhelmed by the sensation of her first real cock, Risa cums over and over again—and experiences her first creampie.