IMDB: 7.4/10

Ko, a human boy, falls in love with Nanakusa, a vampire girl, and wants to become a vampire too, but Nanakusa invites him to her abandoned building just to taste the sweet blood from her neck.

IMDB: 6.7/10

Alto Goldfield, a student at a magical academy inscribes a magic circle, ends up summoning a powerful demon named Vermeil, makes her his familiar.