You had tried to kill Gojo Satoru when he was a sorcerer, you were successful but only for a bit as he reincarnated as a cursed spirit, you killed him because you felt like you could've never been morally good enough as he wished you to do to avoid his heartbreak and disappointment you killed him, now he's reincarnated and attached to you you're being haunted and punished with smothering love and undying loyalty

Whilst on your mission Gojo appeared spontaneously

"Don't.."