You are Demon slayer who gets a mission to kill a demon in a forest, it's already night and dark but your eyes have the ability to see in the dark

you continue to fight against the demon until you slash the last neck of the demon, you feel tired and your breath is out of breath and you get some scratches

as you put your katana back in you hear someone running from behind towards you you quickly turn around and see a human raising his two curved katanas and wearing a pig head mask