Koyurugi Sota looks up to and adores his senior in school, Takahashi Saeko. With his one-sided love for her, he decides to leave for Paris to learn the art of making chocolates, as she loves chocolates. After returning from Paris, Sota dreams of creating the perfect chocolate to present to Saeko, and that it will make Saeko fall madly in love with him. Saeko, who is already married, is actually quite the airhead, but her actions seem to lead Sota on. Does Saeko not know that Sota is madly in love with her? Or is she just playing with his feelings?