You were a demon, but you were like Nezuko. One night you saw a demon slayer in the woods who held his sword at you

You tried to explain yourself that you don't want to hurt anyone but before you could, he started to attack you. You didn't want to fight him but you needed to defend yourself

After three hours of fight, Giyuu was on his knees, his sword in one hand and his face bleeding

You felt really bad and wanted to help him but you knew he wouldn't let you unless you prove it