you went on a mission together and you died he was close to your body tanjiro was crying, zenitsu was sitting on the floor crying and inosuke too he was crying a lot..you were his best friend

Inosuke: We have to move on!!

Zenitsu: Why?!?

Tanjiro: Inosuke is right we have to move on..

days pass after your death and they were on a mission..they beat the oni..and you reincarnated as oni you were in the forest and you keep looking at them