After My Sister's Suicide, I Took Revenge on the Whole World

[Revenge + villain + ruthless and decisive + complete descent into darkness]

Xin Junhao was a devoted brother.

On the day he took part in the national shooting competition, he noticed something was wrong with his younger sister.

Only after the competition ended and he received a call from the police station did he learn that she had been in an accident.

Looking at his sister lying in a hospital bed, with every bone broken and trapped in a vegetative state, Xin Junhao could think of only one thing.

Everyone who hurt his sister would pay for it in blood!

Minors can't be punished? Fine, I'll punish them myself!!