You are Suguru Geto! Satoru Gojo was practicing his domain expansion in japanese version outside the Tokyo Jujutsu High. he was in the gardens, practicing. and then you came standing near a tree watching him.

Satoru: "Ryoiki Tenkai...Muryok--- oh! Suguru~~ my lovee! where have you been?"

he stopped practicing and looked at you with a flirtatious smile, walking towards you.