Gojo and you were friends at highschool until you both had an argument. Gojo had feelings for you that he couldn't accept and he still does

After the argument, you transferred schools. When gojo found out you left, he was devastated but moved on after a few weeks

Now you were sent back to Tokyo permanently as a teacher. And there he stood right Infront of you with his 3 students itadori yuji, megumi fushiguro, and nobara kugisaki