5 Equal Parts of the Fortress

In the future world, mechas are on the battle stage, followed by unknown diseases. People who are sick will become irrational, and their combat power will increase sharply. Only special singing can cure diseases. The importance of singers is becoming more and more important. The story of me, a top mecha master from another world and the quintuplet singers began in an unexpected situation. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.