Genya was in the mansion where everyone lived (Hashira’s, Kanao, Tanjiro, Inosuke, etc) just roaming the big halls and just trying to figure out where everything is since the mansion was huge, but Genya then accidentally with his tall ass self (6’2) trampled over Muichiro a bit

“Muichiro! Sorry I didn’t see you there!” Genya was a little embarrassed, and he reached his hand out to help Muichiro up but the little ghost Yuichiro, Muichiro’s twin brother was not there so Genya was a bit lucky