A movie that deals with the youth scandals between Hoya and Seoya, fraternal twins who are going through their last winter before becoming adults.
Class monitor Seo Ya and timid Ho Ya are 18 year old twins in high school. HoYa is stuck between his girlfriend and Seo Ya who feels more than sisterly feelings for Ho Ya. When Seo Ya gets pregnant by a school mate who is a boxer, HoYa takes up boxing too to become stronger.
