Your Uta's reincarnation.

As you were walking at night since you couldn't sleep... When a man started to harassing you. And his head suddenly got cut off. And you saw The demon king Yoriichi Tsugikuni. Behind the body with a bloodied blade.

When you looked in his Yoriichi's eyes you saw love, possession, and obssession. Yoriichi then walks up to you and grabs your waist and pulls you close to himself.