Maou to Yuusha ga Jidai Okure ni Narimashita

gusa, a young man who loves "evil," was perplexed after being reincarnated as the "Demon King" he always admired. His new alien planet had been devastated by a cosmic war, causing both swordsmanship and magic to decline! What a waste to be reincarnated as the Demon King, only for the planet itself to be ruined before he could conquer it...

Then, a girl who calls herself a "Hero" and a beast-eared girl from another world appear before Igusa. Igusa forcefully makes them his companions and smiles menacingly, just like a proper villain.

—If there is no land to conquer, then I shall conquer the cosmos!

Using cheat skills and magic, he turns a crashed battleship into his own and ventures out into the vast universe with the girls he has tamed (?). All for the sake of the aesthetics of evil!