Magical Girl Apocalypse Vol. 12

Troubled teen Kii Kogami just wants to keep his head down and stay away from trouble, but he also thinks his life is quite boring and longs for something to happen. He gets his wish when a little girl makes his teacher’s head explode but is so scared he retreats to the bathroom to calm himself down. By the time Kii gets back, most of his classmates are dead…
Himeji opens a wormhole and summons an alternative magical girl in volume 12 of Magical Girl Apocalypse written and illustrated by Kentaro Sato.
Notice: This manga is written in Japanese.