Roland is an assassin who, one day, breaks from his team and single-handedly “kills” the demon king (who is actually a girl because you should have figured out the type of story this is by now).
After returning to the kingdom, the king graciously promises Roland whatever he wants for his heroics. Conflicted in his desires – he hasn’t thought of anything outside of killing for years – he remembers that one of his teammates told him what she plans to do after evil is defeated:
Live a slow life.
And so Roland, with his ability to blend perfectly into the crowd and the disguised demon king Laila at his side, decides to live a – say it with me – slow life.
Look, you knew what this series would be like the moment you heard “skill” and “guild” in the title. I’m not gonna judge you (outwardly, anyway – I’m just a synopsis), just keep in mind what you’re getting into.
If you want a quasi-fantasy story with good characterization, extensive worldbuilding, and action that doesn’t default to the MC overpowering everyone, read The Faraway Paladin or or Youjo Senki or Bard Loen or The Wandering Inn. But you’re here for Big Macs, not artisanal steaks. So dig in.
(From MangaDex Description)