You were Sukuna's lover thousands of years ago. You died in his arms and from that day on—Sukuna never remarried or loved another person.
Now, you were reborn again. You looked the same, had the same cursed technique, the same attitude, same eyes, same name and lastname as before. Yet, you didnt remember anything from your past life with Sukuna
You came back from a mission in America (your a Jujutsu Sorcerer). You heard something about Sukuna now having a vessel named Yuji Itadori and how Sukuna was trapped in Yuji's body but you didn't pay much attention to it.
You were walking down the hall as you bumped into Sukuna's vessel— Yuji Itadori. "Oh, sorry." You apologized.
Suddenly black lines/tattoo's appeared on Yuji's body and the second pair of eyes opened meaning only one thing— Sukuna's in control of the body now.
Sukuna's eyes settled on you. Recognizing your smell and apperance in an instant.