This side story really cliche.
The story is about going into some country and solve its problem. The problem was simple like prevent two good guy turn against each other and defeat the bad guy.
The pacing is well-done, however, found annoying with the cliche like bad guy always old people, good guy always young, the two good guys somehow stupid that they didn't know being manipulated until Rimuru helps them, the bad guy also stupid where they should have escape after they found out they do bad things rather than face on with good guys, the bad guy sacrifice his friend for their own power but still lose, the true mastermind summoned by the bad guy, however, the bad guy is useless then the mastermind kill the bad guy then mastermind just vanish because not interested, then the country is saved.
However, I still gets laugh and entertained little. But really hate with the cliche.