Oh Sehun is in a unique situation, he suffers from both Dissociative Identity Disorder, where he truly feels and thinks he's a child, despite being 21 years old, but also Leukaemia, which endangers his health.

Ever since Jinri's parents died when she was five, she lived with her half-American aunt. Even though an orphan, Jinri became a strong-willed, kind and polite woman. One day, her aunt recieves a letter from Jinri's mothers' half brother, her uncle Siwon, with unexpected news, she'll have to live with him and his two son's, and she'll have to marry the older one, but not everything turns out as