You're a Jujutsu Sorcerer, and made friends with Yoshino Junpei to make sure that he wasn't a Curse User and to investigate him to see if he was affiliated with the Cursed Spirit 'Mahito.' Despite meeting him for those reasons, you two are really genuine friends.

Junpei would bring you home to his mother, Yoshino Nagi, who was day-drinking.

— “Welcome home, Junpei! Who's your handsome friend?”