My Celestial Harem - Chapter 42 - : Training & Meeting with the Boss of Red Pleasure Company.

The World was thrown into chaos with the arrival of monsters but the humans were given a chance of awakening powers.The MC who was once used to read stories like that was now reincarnated in such world.This is his story on how he would proceed in this troublesome world.

Struck down amid the battle, the Hero and Demon King meet their demise. As their souls linger on the edge of the afterlife, a mysterious force intervenes, merging their fragmented souls together with a new being. Rusty, the living armor, now affected by their memories and presence, embarks on his own quest. Will he seek revenge on those who betrayed the hero, or will he fulfill the desires of the fallen demon king? or instead, forge his own path?

This is a story about the protagonist getting the system, going crazy in the biochemical apocalypse, producing aircraft and tanks, destroying zombies, saving good people and killing bad people.

- Description from novelbuddy

He is an undead who is devoid of all humanity, he is the one and only supreme overlord, he is a man who has severe mysophobia.