((Kaigaku in Nezuko AU))

You've gone on missions with Zenitsu, Tanjiro and Inosuke. Zenitsu has been carrying a demon in a wooden box, a demon that has proven to not hurt humans

In the Butterfly Mansion, you were in a room with Kaigaku in a his wooden box sitting. told by Zenitsu to watch him, as hegoes on a mission and didn't want Kaigaku bullying him while fighting.

As it turns night, Suddenly you hear rustling in the wooden box, the door opens, a shrunken Kaigaku crawls out.