Song Jin-Woo (Kim Dae-Gun) has worked as a non-permanent contract employee for the past 4 years at Moojin Girls' High School. He is a good teacher and dreams of a school where no one is left out. New contract teacher, Yoo Sung-Pil (Moon Yoo-Kang), comes to Moojin Girls' High School. When Song Jin-Woo was a high school student, he was bullied by Yoo Sung-Pil and other students.
김대건
as Song Jin-Woo
문유강
as Yoo Sung Pil
Woo Da-vi
as Park Hee Jin
이연
as Lee Eun Seo
한상진
as math teacher
