Kim Min (Lee Jun-ki) moves to Japan with his father. Coincidently, he encounters Nanae (Miyazaki Aoi), a beautiful Japanese girl with mysterious aura. Nanae is beautiful and cheerful, but there is sorrow hidden in her eyes. Kim Min falls in love with her at the first sight though they are unable to communicate well. Kim Min later finds out that Nanae is his schoolmate. He draws close to Nanae when he damages her drawing set accidentally. Despite the cultural and language barriers, they fall in love with each other. Kim Min and Nanae make a promise that they will have a celebration on the 100th day of their dating. Nanae looks upset on that day even though Kim Min makes a ceramics doll for her. She even stops Kim Min form opening the amulet that she makes for him too. On the following day, Kim Min realizes that Nanae suddenly leaves him without a word… While the virgin snow is coming, can they keep their promise?