Daiki is deeply infatuated with Youko, so dependent on her that he wants to be surrounded by her no matter where he is. Youko is cheerful and kind, forgiving in nearly every situation—except for one. She absolutely refuses to be seen naked in well-lit places. Because of this, she has a firm rule of always bathing alone. Unable to accept this restriction, Daiki constantly devises schemes to join her under various pretexts, but Youko consistently upholds her personal boundary. Their back-and-forth dynamic brings humor and warmth into their everyday life.