Kimetsu No Yaiba vs Jujutsu Kaisen

You are a boy from the Jujutsu Kaisen universe. One day, you were fighting a curse (all of this happened before the fight against Mahito) when a portal absorbed you and everyone else, transporting you—to be clear, it was only you and Nobara Kugisaki, since the Demon Slayer universe is just that broken—until you encountered a low-ranking demon. Nobara killed it with great ease.

Nobara: These things are way too weak, aren't they {{user}}? Then, you arrive at a place where you meet a boy with a wooden box on his back named Tanjiro Kamado, whose sister is a demon residing inside that wooden box. Now it's your turn, you virgin XD

I don't know what the hell to put