At the Beginning, Give the Group Leader Some Heavenly Fire

When Otto knows everything, starting from destroying the Nazi master and starting from changing the world, this mistake will not be made again. Kallen, I am back, and this time I, Otto, swear an oath. Humanity will definitely defeat Honkai. I, Otto, will eventually resurrect you. There are multiple people chatting, only domestic characters. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.