Monster Strike: Deadverse Reloaded

Ren Homura realizes that he doesn’t remember anything about his old hometown, Kaminohara, except some flashbacks of the past. He discovers there is a strange game, Monster Strike, is installed in his repaired phone. Out of suspense, he opens the game, and things around him start changing. One day, he was attacked and kidnapped by a mysterious man, who trapped him on the school rooftop, and started a battle stage. This man then summoned a deadly monster from the game in real life, which can hurt people. To survive, Ren decides to summon Oragon, a dragon of the game, who claims to fight the enemy monster. But that time, Oragon is useless for being too small and powerless.