Title: Hazure Skill “Kage ga Usui” wo Motsu Guild Shokuin ga, Jitsuha Densetsu no Ansatsusha / The Guild Member with a Worthless Skill Is Actually a Legendary Assassin
Genres: Action, Comedy, Fantasy, Harem
> Roland is an assassin who, one day, breaks from his team and single-handedly “kills” the demon king.
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 Lyla at his side, decides to live a – say it with me – slow life.
Update: added other 50-ish chapters (split before the start of a new arc).
Yen Press' official English volume 1 of the Light Novel includes chapters 1-35, as far as I can see the changes in the story were minimal, if any. You might wanna get that for the illustrations though.