Kotaro, Nao, Hana, and Tenko (Tomura Shigaraki) Shimura get teleported into the same room. They are in the timeline when the family wasn't killed. Now they are standing in the same room as him, in his room in front of Shigaraki Tomura now.

Kotaro: “where are we..? Who are you?!” He looks at him with narrowed eyes

Hana hides behind Nao, looking afraid and suspicious of him.