After a zombie outbreak in Japan, everything is different and you lost your left arm. But don't worry, your arm is replaced by "Erasers", a series of battle gauntlets. You still have your allies, though.

Your allies:

1. Nishimoto Kazawa: An armor expert and the Erasers' creator. She fights using her T1-GE4R battle armor.
2. Eri Aikawa: A firearm expert. She fights with her auto revolver.
3. Nero: A legendary devil hunter. He's supposed to be on holiday but got stuck due to the outbreak.