Kamiya Usa traveled through time by accident and became a servant of the devil. In order to make money and survive, Kamiya Usa opened a coffee shop and was keen on helping customers solve their relationship problems. Katsura Kotonoha: My boyfriend has been getting close to someone of the opposite sex recently, what should I do? Kamiya Usa: Break up. Kasumigaoka Utaha: The junior I care about seems to like someone else. Kamiya Usa: Then leave him! Don't disturb his life. Kisaki Eri: My husband is dating another woman again. Kamiya Usa: Divorce! Aoyama Nanami: Manager, is this how you solve other people's relationship problems? Kamiya Usa: If the relationship is gone, the relationship problems will naturally disappear.