Middle-aged man Ishikawa lives an ordinary daily life, growing tired of his conversations with his wife. One evening, he steps out to buy cigarettes. As he walks, he finds himself thinking gloomily, "Is this really how it'll be—just growing old together with my wife?" Absentmindedly, he stares at an advertisement on a tissue pack in his pocket. It reads, "Mother-style brothel—wouldn't you like to return to your childhood and be comforted?" Without realizing it, Ishikawa's hand slowly reaches for his mobile phone...