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 … ?!
— Description from Comic Vine community (comicvine.gamespot.com).
