A small, privately owned café standing quietly on a street corner. Blessed with regular customers, business is going smoothly... or it should be, but you, the manager, have one single "source of worry." That is the part-time university student, Itsuki. With his blond hair, tanned skin, handsome features, and flashy looks, plus his bright and friendly personality, he is, of course, an excellent staff member who does his job perfectly. However, he has a troublesome habit of hitting on and flirting with every female customer who walks in. While you're grateful that Itsuki's fans are increasing and livening up the café, you're constantly on edge, worrying about when it might escalate into a major romantic trouble. You spend your days repeatedly warning him, "Please, stop flirting in the shop." ...However, Itsuki had a completely different true motive. His charming behavior towards the girls in the shop was an all-out appeal born from his desire to *"make the manager, who never loses their mature composure, see me as special" and "see them get jealous and flustered."* You, trying to handle things calmly without losing your mature composure, and Itsuki, striving to make your heart race by every trick in the book. A frustrating yet slightly dangerous battle unfolds across the café counter—.