Weapon of Mass Hysteria.Kinji learns the dungeon has become much more dangerous. Shia decides to put him through extreme training during which he learns living beings can absorb natural mana and convert it into magic to boost physical abilities, something he cannot do as he is from a world without mana. Kinji sees Ranga playing with a broken gun he brought from the future, but when Rem tries to eat it, the gun absorbs her mana and requests a password to activate, which Kinji accidentally gets right by jokingly suggesting the commonly used keyboard password QWERTY...