The Succubus' Seductive Trap Dungeon

Kazanstar, the village of warriors. it is here that the heroes of the future are raised.
And of course, everyone has their own job. fighter, mage, monk, the usual.

Our hero Mirai awakens one morning to go greet his friends and companions.
But suddenly, the town is assailed by succubi! And the womenfolk are nowhere in sight!
That is, until he checks the jail, and finds them in a deplorable state of humiliation.
They've fallen under the demons' spell — well, not all of them. Mirai, Tsubasa, Kai,
and Kaoru have all escaped, and are determined to bring peace back to their city.