Is This A Zombie Graphic Novel GN Vol 07 (Mature Readers)

Zombies - with a magical twist - and a magical girl! A very zombie Christmas is right around the corner! But what's this? Haruna, Eu, and even Sera seem to be getting jealous over me - or is it just my dead-sharp imagination? And let me tell you, I've been eagerly anticipating my chance to settle the score with that Chris! Say, who in the world is this tiny little girl? Huh? She's interested in me?