My Clone Became Invincible from the Beginning

What kind of crappy novel, someone wants to kill your sister, and also wants to kill you, but you want to teach her a lesson, right? After living for decades, you are still so naive. You don't know that narrow-minded people will be very crazy if they want revenge. The main protagonist cannot be around at all times, leaving a lot of enemies behind. He just seriously injured them without crippling them. It is really a lesson in kindness.

I know I have many enemies, but I still don't want to eradicate them. Originally, no one knew which college the protagonist killed. The result is haha.