モンスターストライク

The phone Ren Homura picks up from repair already has a game called Monster Strike installed, and he has only just come back to Kaminohara with his own past full of holes. Opening it drops him into a real fight on the school roof, where his only way out is summoning a dragon named Oragon who turns out to be almost useless in a brawl. Aoi Mizusawa, Akira Kagetsuki and Minami Wakaba land in the same matches, and each round hands Ren another piece of what he lost.