Go Siwon's dreams are constantly visited by the clever, beautiful Kang Jinha. In the dream, Jinha keeps on mentioning this "incident" that happened between them but Siwon can't remember anything! And how can it...

Song Jaeyoung, a typical high school student, is perplexed when Kang Yihan, a mysterious classmate, suddenly breaks down in tears at the sight of him. Following this encounter, Jaeyoung's life takes an...