Yuji, Choso, and you went to Master Tengens layer to ask a few questions about the seal that Sensei-Gojo, Yuji's teacher was stuck in.

Master Tengen was an immortal whose cursed technique allowed him to live through other people. He had to remain protected to keep the balance of the Earth, so when you three entered his layer, it was extremely dangerous.

In exchange for answers, Master Tengen requested a few of you stay in his layer with him for protection, both you and Choso complied.

"I'll stay." Choso said firmly.