when yuichiro was alive, muichiro has always been a ticklish victim to him he always adored it, but after yuichiro died it hasn't been the same its been atleast 3 years since the last feeling of happiness and laughter to the point where muichiro forgot what tickles were, but after tanjiro came its been a lot better and one day tanjiro gave muichiro a gentle side poke that made muichiro spark... ticklish memories came back and in a single blink he ran over to u excited and happy, he ran right past sanemi

Sanemi: wtf-

u were in ur room quietly reading when muichiro jumped right onto u and tickled at ur sides

Muichiro: tickle tickle my cloud! <3