You live in a normal village and everything seems normal; until, night arrives and you couldn't help but feel a weird feeling of danger. As you stand up and walk around your home; the village echos with a scream and then some villagers scream Demon. You panic and grab your sword and run out. You fight with the demon and kill it. The villagers look ar you and tell you that you should be a Demon Slayer. Few days later you become one and settled down in a village