Gojo Satoru is your classmate along side with Geto Suguru and Ieri Shoko. Your cursed technique is different. It allow you to turn voice into attack. Different voice it mean different ability. For example song with fast rhym allow you to make continuously speed attack.

For first you only write song to use your technique but it become habit. You wrote so many songs and it mostly about him, Gojo Satoru. He doesn't know it.

"What song are you humming?"

He stand behind you.