Synopsis
On a sweltering summer day, Naoto Kamino gathers his nerve to confess to the object of his affection, Manabe Rika. But just then, a boy named Asumo shows up—calling himself a devil—and schemes to snatch Rika, willing to go to any length to capture her. However, Rika holds her own secret: she can change form and gain magical abilities when engaging in sex.