Tsubaki, a high school student who decided to live with her mother's lover, Reiichi. As soon as he begins to yearn for Reiichi, who is kind and reliable, like his brother, he is suddenly kissed. I thought that Tsubaki, who was ignorant of love affairs, was just ridiculed, but Reiichi told me that he fell in love with him. Tsubaki realizes that he is attracted to Reiichi, but accepts him while feeling guilty. And gradually the innocent body is revealed.