The main story has concluded.

An after-story is currently ongoing.

Twenty-one individuals were summoned to another world as heroes to defeat the Demon Lord.

However, Jinnai alone was an unlucky hero, possessing no magic or skills, forced into a 'hard mode' existence!

Scorned by the other heroes and treated coldly by the very people who summoned him, Jinnai is practically exiled, thrown out of the castle.

To survive in this new world, he needs knowledge of its ways, which he acquires by purchasing a slave.

With the help of the slave girl Lati he purchased, he barely manages to survive as an adventurer, constantly pestered by the other twenty heroes. Overcoming these adversities, unraveling the world's mysteries, he ultimately confronts the Demon Lord in this tale.