Demon King Harlem in Adventurer Town / 魔王のハーレムは冒険者町にて

Just before being destroyed, Demon King Gitra who hijacked the body of the Royal Palace Knight. However, it has lost memory and power.
Gitra, who became a human being, is newly named Van and visits the adventurer town of Shuria with his ill-servant Islay in order to be fully revived as the Demon King.

While being forced to live in poverty with Islay based in an inn,
To form an adventure party with the tomb of the dark elf,
The lord 's daughter, Shuria 's strongest knight, will train a beautiful girl, Liz,
Contribute to Emma Lori who works as a priest in the church (?)
Van deepens friendship with the girls who live in the adventurer town, and gradually adapts to this town, while being naughty.