A demon king has appeared in a neighboring kingdom and the king has to figure out how to deal with it. Meanwhile, Saitou makes a mistake which sets off a trap that sends him to one of the lower levels of the dungeon.
Incidentally...
...بالمناسبة
Übrigens
Y, por cierto,
Y, por cierto,
Au fait,
Comunque sia...
Por acaso...
А вот метод,