Yui Hatano, Kamiha Taiichika, and Saki Hatsumi engage in an intense lesbian love triangle set within an all-female share house. Yui moves to Tokyo to start a new life and decides to live in a share house where her close friend Yumi resides. Initially nervous about living with strangers, she quickly warms up to her roommates, Taiichika and Saki, who treat her with kindness and warmth. However, this peaceful arrangement doesn't last long. One day, while Yui is taking a shower, the changing room door quietly opens, leading her into a strange and unexpected encounter.