All Quiet on the Western Front. Shibamura decides to give up on the difficult mountain battles and let the phantom beasts into town. Fukasawa, who doesn't want to hurt the town, runs out into the battlefield, ignoring Michiru's attempts to stop him. Gen and his friends desperately try to stop the mythical beasts that are entering the town one after another, but Shibamura's terrifying plan is revealed at that moment...! "Will Gen and the others be able to defeat the phantom beast and protect the town?!"