Jinwoo Seo and his twin brother, Jiwon, who have almost the opposite point of view,likes and dislikes and who grew up in different countries. Now that their parents, Inguk Seo and Cha Yeonjin, decided to live permanently in another country they struggle to adopt in everything this country has to offer. Jinwoo who is sickly stays at home and be homeschool due to his weak body, Jiwon on the other hand studies at a normal school both found a mysterious girl and falls in love but will one of them give in for his brother or will this girl destroys them both?