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 Laila at his side, decides to live a – say it with me – slow life.