The Demon Ororon

A 15-year-old girl named Chiaki, who is half-angel and the daughter of Michael and a human, takes in a devil named Ororon who is downcast and vows to remain with her. Chiaki is rejected by the angelic world due to her mixed heritage, while Ororon, the youngest son of the Lord Devil, is shunned by his own for being a potential threat to his brothers' rule. As representatives of heaven attempt to kill Chiaki, she discovers that Ororon's immense power is an asset. Meanwhile, as multiple assassins target Ororon, he begins to understand from Chiaki the importance of valuing life.