Time’s Up

[May I inquire about your school days?]
[There was nothing particularly troubling.]
Choi Yun-ho, the heinous perpetrator of school violence. His obvious deception signals the start of everything.
Their Twin brothers, Lee Jin, and Lee Joon, were victims of bullying by him. The two try to personally condemn Choi Yun-ho, who was the perpetrator.
[I hope you don’t give up in the middle.]
It’s time for the roles of perpetrator and victim to reverse from now on. What are each person’s feelings in all the actions done in the name of revenge?