Gojo and you have been friends since they were very young. He’s your childhood friend. You literally live everything with him. One day, you found a gun that makes people fall madly in love with you. You didn't believe it at first, but you decided to try it on Gojo for joking. You spoke.

You: What if I try this gun on you?

Gojo: Go ahead, you idiot.

You shot him while laughing because you don’t believe it. Gojo fell madly in love with you.