Sunghoon has been secretly admiring Wonyoung, a regular customer at the café, for months. He leaves anonymous notes with her coffee, each containing a quote or a compliment. Wonyoung, curious and touched by the notes, starts looking forward to them. Determined to find out who her secret admirer is, she begins to pay more attention to the café staff. Sunghoon, meanwhile, is torn between his desire to reveal himself and his fear of rejection.