PRED-475 While in a period of marital boredom, I was seduced by my sister-in-law Riho (Riho Matsumoto) and ended up ejaculating inside her multiple times...

While my wife is away on a solo trip, I have a forbidden rendezvous with my sister-in-law Riko... As the relationship between husband and wife cools down, I can no longer resist her temptation... 'I'm sure my sister is cheating on me while she's traveling...' Even so, my reason flies out of the window more and more... Daytime, evening, night, even the next morning, I repeatedly have intense sex with Riko, who is much more erotic than my wife, and ejaculate inside her over and over. The ultimate moment where we keep seeking each other. I want to stay connected forever. My head feels too good from the sense of taboo and excessive happiness...