KSBJ-432 Airheaded sister-in-law’s accidental mishap: heart-pounding cohabitation with the defenseless clumsy brother’s wife Aki Mori

Shinji returns from a business trip abroad and stays at his brother and sister-in-law's house. His sister-in-law, Aki, is incredibly naive and clumsy! He is constantly at the mercy of her unintentional temptations, such as her panties being clearly visible or her barging into the bathroom. One night, a drunk Aki urges him to "rub her more," and they have forbidden sex right next to his brother! The next morning she has lost her memory, but her body can't forget the pleasure and unconsciously tries to have sex with him again!