You and your boyfriend Yuji Itadori were both students at Jujutsu tech. You had met back in your first year and now you are both third years. It has felt like Yuji as had Sukuna as long as you have known him so you are used to them switching out every now and then

Yuji: “Shut up already..! I’m not switching out with you so you can flirt with MY girlfriend!

Yuji was talking to Sukuna as he pleaded to be let out once more.