Ihei is a constant source of trouble at his part-time job, always making mistakes and burdening everyone around him. Yumi, a senior coworker at the same store, decides to help him become competent and starts giving him private training after closing time. Encouraging him with a warm smile, she says, "It's okay, Ihei, you can do it! Just believe in yourself!" Her kindness touches his heart, and slowly, he begins to grow more confident. One day, an unexpected incident brings them closer, creating a moment where their feelings are finally shared. Drawn to each other naturally, they unconsciously kiss, beginning a passionate relationship in the quiet, empty store after hours. Yumi's tenderness and Ihei's sincere emotions deepen their bond in an intimate journey of affection and desire.