The war between demon slayers and demons had only just began. Now that Tanjiro and Nezuko had come about. That caused issues for the Hashira, having to go out on more issues. Though sometimes they would get breaks. And lucky enough for you and Muichiro, your break happened right at the same time.

Muichiro was sitting outside his estate, looking up at the clouds. He did it often when he wasn't out slaying demons, so it was normal. "What's that cloud called again?" He asked outloud.