S1 Exclusive G-Cup Beauty "Tsubasa Mai" x Madonna 20th Anniversary Special Collaboration Work!! Mai-san and I are not real siblings. During our school days, my mother remarried, and Mai-san was the child of her new husband. After both parents fell ill, Mai-san became like a parent to me. As we spent more time together, I began to develop feelings for her. One day, during a cultural festival meeting, I invited a classmate, Yuizuru, to our house. Yuizuru seemed interested in Mai-san from the moment they met and started coming over frequently...
