SSIS-845 [Uncensored Leaked] My girlfriend's younger sister, whose breasts are all grown up, is so curious about the 'SEX' she learned at school that she innocently makes me horny! Yuri Adachi

When my girlfriend came over to my house, my younger sister Yuri came with me. She was very interested in the "sexual act" that she learned about in class. However, Yuri's breasts have grown so much that they are surprisingly large even for an adult. However, she is insensitive to the attractiveness of her own body, and she innocently uses her breasts to seduce me in order to experience the "sexual act"... After we crossed the line, she started coming over to my house regularly and begging me for the "pleasant act of sex"...