"Does breast play alone not count as infidelity?" During his period of abstinence, he was subjected to the best breast play by his girlfriend's older sister, accumulating an uncontrollable, endless cycle of ejaculation over seven days. (Yamitsu Rin FSDSS-769)

Suspecting me of having an affair, my live-in girlfriend put a chastity belt on me. One day, her older sister, Rin, couldn't sleep because of construction noise and decided to stay with me for a week… Seeing Rin after she showered, I couldn't help but get an erection! Rin discovered the chastity belt. She half-jokingly played with it… and then… the little devil Rin began a week of breast-fucking ejaculation control! "Please lend me your breasts, sister. I can't hold back anymore!"