Life was normal for Taeyang. He had friends, went to school, had a job. Then suddenly one day he gets a substitute teacher who would be his age. Little did he know that his life would change. But is it for the best or worst?

Taeyang- Main Character, living a normal life. Lives with his younger sister IU

Chorong- The new Teacher who is in for the old one.

Gd, T.O.P, Daesung, Seungri, JayPark, Song Minho, Bobby, BI, Junsu- Taeyang's friends

Tablo- the old teacher.