Retiring from being a boy and entering the chaotic world of girls! One morning, Azusa Takenaka, a second-year high school student, suddenly turned into a girl. Without understanding why, Azusa went to school and quickly became popular among both boys and girls. Before she knew it, she had inadvertently created a Yuri harem. Amidst all this, her step-sister, Kaname Takenaka, with her intense brother complex, schemes and sneaks about at night, aiming to make Azusa hers. Thus begins the tumultuous life of Azusa as a girl.