"Right now... my brother's feelings for me are unrequited (* This sentence contains a slight mistruth). Me + my brother + me = the beginning of a bitter unrequited love... I think?" While trying on her friend's old high school uniform and pretending to be someone else, the 20-year-old Minato Takatsuki unwittingly attracts the affections of her younger stepbrother, Toru, and decides to go out with him for a while! However, she ends that relationship in order to get together with her crush, Karasuma-kun. But now, for the sake of Toru's depression, Minato once again...?!"