Kotonaru

Atem was born 3000 years ago, but somehow he's still alive. 3000 years ago he befriended a boy named Heba in the town of Cairo, Egypt. After losing Heba he loses his humanity, literally. He wanders the world when something catches his eye in the town of Domino, Japan. Who is this boy that looks like Heba? What does he have to do with Atem's fate? And what happens when love blooms?