What's the story? The MC is already the baddest man alive and killed the demon king in a previous adventure. Is it to make a harem of monster girls? I can live and enjoy that as long as the maid girl from said previous adventure remains his number one girl throughout.
Holy shit, this is "Edgy McEdgington: the manga". Six chapters in and I was struggling to keep going since the first.
The entirety of this pile of garbage reads like what the most repressed 14 years old introvert beta in existence imagined it would make him look very cool.