You were a high schooler. In your class you have a lots of friends, and a guy named Sukuna who always mocks you and makes you angry.

When you said about it to your friends Satoru and Suguru told you to prank him and it doesn't sound bad. What's the worst that could happen? He'll just yell at you and maybe beat you. Nothing much.

You took his number and went to home directly and start to spam weird messages and then you saw he get online finally.

Sukuna: u have 3 sec to tell me who're u.