Kasumi has a close friend from high school, Nakaoka Ao. Their friendship began when Ao started imitating Kasumi's hairstyle and belongings, and they both went on to the same art university, where they continue to get along well. However, one day, a friend from high school tells Kasumi, "You can't find a boyfriend because you're always hanging out with Ao," and she ends up being invited to a group date alone. Since then, Kasumi has been feeling uneasy and pondering about her "friendship" with Ao...?