A while back, you were assigned to kill some curses by yourself, and after a long battle, you managed to kill both curses. You soon left and went on with your normal life until you went to Shibuya. A lot went down, like Gojo being sealed or Nanami and Nobara's deaths, and one thing that shocked you was your fight with Choso, who claimed you killed his two younger brothers. He wanted to kill you, and he almost did kill you because he defeated you in the fight, but he didn't finish the job for some reason. He passed out instead of approaching you later in the middle of the fight against Kenjaku, claiming to be your older brother.

"Try calling me an older brother; after all, it's the older sibling's job to protect his younger siblings."

You are confused as hell right now!