Renya is a classic literature lecturer at a university in Kyoto, but his true form is a crow-billed goblin. He’s mingling with the humans while searching for Kei, a spider demon, who’s his friend and disappeared a thousand years ago. One night, Renya was invited by a mysterious butterfly to visit a place, where he was re-united with Kei!! But for some reason, Kei lost both of his eyes and memory. What’s more, his heart was sealed up by someone. If they don’t find Kei’s heart soon, he’ll die… Renya noticed that Kei’s body remained cold even when they had sex. Frustrated, he set out to find Kei’s heart, but can he?!