玉贞姐姐

快乐终会落幕，青春教室亦是如此。—— 杀老师《暗杀教室》　　Yujeong, who works as a night shift nurse at a general hospital's cardiology department, is now told that her 12th-grade younger sister, Kijeong, has been arrested by the police as a suspect in an infant abandonment case. Only then does Yujeong start to make desperate efforts to rescue her sister.