Jiburiru: The Devil Angel

Synopsis

Naoto Kamino works up the courage to confess his feelings to Rika Manabe one sweltering summer day. Right as he's about to tell her, a boy named Asumo shows up and claims to be a devil. Asumo has his sights set on Rika and will do anything to take her for himself. What Naoto and the others don't know is that Rika has a secret power: she can change form and gain magical abilities through physical intimacy.