ROE-475 — My Wife, Whom I Thought Was A Tuna For 16 Years... Was Having An Adulterous Sexual Encounter That Caused Her To Convulse And Reach A Fish-Like Orgasm, Continuing Until She Fainted. - Momoko Isshiki

Momoko, a beautiful and kind married woman, lived happily with her accomplished husband, Sadaharu, and their nephew, Hayato, who was struggling to get into university. However, this couple had one major problem: Sadaharu was terrible at sex, and Momoko was incredibly unresponsive. One day, Hayato witnesses this and is shocked by Momoko's lack of sexual responsiveness. Although he is a virgin, Hayato is confident in his large penis and the techniques he honed at working in the sex industry, and he thinks he can satisfy Momoko. He kisses her and tries to have sex with her, but she climaxes in a way that exceeds his imagination...