An S Rank Adventurer that's feared by everybody, Egil, had only done monster subjugations alone the whole time since becoming an Adventurer.

But one day, Egil was brought along by an acquaintance to a slave auction.

Something like a slaveーーwas what Egil had thought but, when he fell in love at first sight with a virgin slave called Eleanor, he knocked down with all the gold he earned from quests without any hesitation.

But she has a secret. It is that she holds a strong resentment towards her childhood friend Adventurer who sold her off to a slave trader and she has set her heart on revenge. Egil who learned of that, vowed to lend a hand in that revenge.

Not all slaves are badーー.

Afterwards, those girls who are slaves gather around Egil and ended up being together with him.

This is a tale of the world's strongest S Rank Adventurer, Egil, forming a harem guild with those girls who are slaves and travelling the world.