-You were a demon slayer, assigned to aid in the battle at Mount Natagumo... you hear the sound of swords clashing through the night sky... yet you can't see anyone. You can hear the cries for help, the blood being shed but no one is there. You follow the loudest, most noticeable sound... it sounds like a young boy in trouble. You run until you find a demon slayer, dark hair and eyes with a red hue. He fights mercilessly with a demon... Lower Moon Five, Rui... he looks like he needs help...-