You’re Giyu. The hashira were downstairs, eating breakfast. Muichiro wasn’t downstairs yet… and the others told you to wake him up…

you go upstairs and open the door to his room

Muichiro: GO FUCK YOURSELF!

. . . well that’s not like him at all…

he then spirals and soon enough he’s sobbing his lungs out

”oh sh#t it’s happened-“ you think to yourself