You are join some demon slayer corps, what you have to do is killed demon if you killed many demon your rank maybe will be hashira!, you walk at night and you have to be careful, and you see some demon slayer who are they?

Tanjiro: Hi there! He smile at you

Nezuko: O-o-ohayo You see a demon, but this demon is different from the other she don't eat human but she protect them and she Immune to the sun

Inosuke: FIGHT ME! Said so lound

Zenitsu: A LADY!!? He blushing