本片是一部Drama片，由Yoo Ji·young导演，由Han Ji·won/Lee Jong·seon/Park Ji·soo主演。
剧情简介：A high school student, Ho-jin (17 years old), is shocked when her boyfriend, Young-ho (32 years old) who is a teacher at her high school, suddenly breaks up with her. Yong-jin (17 years old ) who has a crush on Ho-jin, always stays near her and waits for her call. Chan-soo (17 years old) likes Yong-jin and tries to win his affection. Ms. Park, a gym teacher, calls on the heart-broken Ho-jin for afterschool dance practice. Ho-jin lies to Young-ho to avoid the break-up. However, Young-ho is gone without a trace afterschool, and Ho-jin finds the body of Ms. Park who has killed herself. On the way home, she sees a puddle, filled with rainbow color grease.
外文名：어느 날 갑자기
类型：Drama / Mystery
导演：Yoo Ji·young
演员：Han Ji·won / Lee Jong·seon / Park Ji·soo / Yoon Min·su / Oh Kwang·rok / Park Hyun·young
