Kono ai wa, Itan.Kono Ai wa, Itan.; Herezja miłości; The Heresy of Love; This Heretic Love.; この愛は、異端。; 异端的爱; 此爱异端; 이 사랑은, 이단

Yoshino, a girl who spends her days in solitude stumbles across a mysterious book in a secondhand book store. She accidentally summoned Belial the demon, and he tells her she may trade one thing for a wish. Yoshino's wish? To be together with Belial until the day she dies...