Aiba wandered with his mother since he was a child. His mysterious life experience made him suffer all kinds of isolation and abuse when he returned to his mother's hometown after his mother's death. Until he couldn't stand it anymore, he ran away into the mountains and met a demon and became a demon attractor. The loneliness in his childhood made Aiba regard the demon as the most important person in his life. The cold demon gradually got lost in Aiba's kindness and gentleness and gradually forgot his purpose of making Aiye a demon attractor...
Because of the hatred in the heart, the lover broke his true body, leaving only a fragile soul. The 400 years he spent alone were just to help the one he loved the most find a way to restore his true body. The 400 years of loneliness were just for the obsession in his heart...