Real biological sisters Akiko (25) and Masami (23), born in Okinawa, visit the home of a male performer in Nagoya who requested their appearance. They came intending to deliver feces as a gift, but an unexpected turn of events awaited them. Masami successfully delivered a large amount of feces directly into the male performer's mouth, but Akiko suddenly gave up and rushed straight to the toilet to defecate. During the interview, Akiko revealed she moved to Tokyo to attend a vocational school, while Masami came to Tokyo from Okinawa burdened with debt and struggling to repay it when she was scouted on the street and decided to appear in adult videos. During their body check, their anal openings and genitals were thoroughly examined by camera and fingers, and their blowjob and sex techniques were compared—both having nearly identical sensations. Next, to induce forced defecation, a BDSM trainer was called in, beginning a session where the two were made to urinate into a cup as part of training. Highly aroused from vibrator torture, the two fight over the trainer's cock. Just before defecation, Akiko refuses an enema, so the trainer orders her to insert the enema into Masami's anus instead. Reluctantly, the two administer enemas into each other's rectums. Finally, simultaneous forced defecation is successfully achieved.