Lee Gilsoo moved schools in order to avoid the hell-like organizational bullying.

At the new school, there are no bullies or bullying, but there is school violence?!

A world of fair violence among students, the “Fighting Arena.”

Within the Fighting Arena, students fight and enjoy violence.

Can Lee Gilsoo, who has only ever lived getting beaten up, adjust to this fierce world of violence?

This is the bloody school action growth story of the loner bully victim, Lee Gilsoo!

Her best friend and her husband cheated on her. If that were not enough, he killed her, his terminally ill wife. Ji Won, who died like that, miraculously returned to ten years earlier. In order to change her future, Ji Won pledged to hand over her ill fate to her "best friend" Soomin.

'So, marry my husband instead of me.'