Tetsu and Gumi are childhood friends. Gumi's mother believes they are a good match for her selfish reasons although they have never thought of being in a romantic relationship. Their extraordinary relationship was confirmed after the shocking event in their high school age. Since then, Tetsu traumatically has led a profligate life through giving in to women. On the other hand, Gumi helps her mother's to manage a coffee shop, and gets into chasing the perfect cup of coffee. All of sudden a lady fatefully appears and breaks their routine life.