In this special collaboration between exclusive Madonna model G-cup beauty 'Tsubasa Mai' and Madonna celebrating its 20th anniversary, we follow the story of two siblings who are not actually related by blood. When their mother remarried during their student days, Tsubasa was the stepchild of her new husband. After both parents fell ill, she became like a parent figure to him. As they spent more time together, he began developing feelings for his sister-like companion. One day, while preparing for a school culture festival, he invited a classmate named Kagura over to help out. Kagura seemed interested in Tsubasa and started visiting frequently after that...

S1専属Gカップ美女『つばさ舞』×Madonna20周年特別コラボ作品！！舞姉さんと僕は本当の姉弟じゃない。学生時代に母が再婚した相手の連れ子が舞姉さんだった。両親が病に倒れてからは舞姉さんが僕の親代わりだった。二人の時間が増え、僕は次第に舞姉さんに恋心を抱く様になっていた。そんなある日、文化祭の打ち合わせで同級生の結弦を家に招いた。結弦は初めて会った舞姉さんに興味があるみたいでその日から頻繁に家に来る様になって…。