After reading a manga, Satsuki begins to worry that she and Uzuki may not actually be twins due to their dissimilar looks. Haruki convinces her otherwise by showing her that Mutsuki looked very much like her when she was younger. Uzuki then begins to wonder the same thing, but Mutsuki convinces her with a picture of their grandmother. Finally, Yayoi arrives home, bemoaning the fact that she can't be related to any of them due to her receiving poor test scores when they all do very well.