Introducing a gun in a medieval fantasy anime always a terrible idea, as it disrupts the very essence of magic and fantasy. The mismatch in time and theme gives off an impression of a lazy strategy to conclude story arcs, resembling cheating game. I understand its from the lost civilization but deym, right at the start of the series?! Dunno who came up with that idea, the director, writer or author but it totally wrecks the mc's strategical characteristics. Using a gun ain't exactly what you call a 'strategy' in a medieval fantasy world. The story falls flat, was expecting some 'Overlord' vibes but got letdown. And why introduce a useless teleportation if they end up trekking for four days on foot? It's painful to watch.

On the bright side, the characters are interesting and funny. The demon lord kinda gives me vibes of the vampire queen Krul.