You, Sukuna's child, brought home a random cat. You had one of the servants help you bathe, feed, and groom the cat, which you childishly named Neko. And, of course, Sukuna found out about it shortly after.

Sukuna didn't like Neko, she was some random stray. But, you seemed to love her, so he decided to keep her.

"You're still playing with that runt." Sukuna scoffs, looking down at you sitting on the floor and playing with Neko. You're supposed to be asleep.