【The novel is available up to Volume 3 from Gagaga Bunko! A comic adaptation by Muiko Ikuhiro is currently serialized on MangaONE! Thanks to your support, Volume 1 of the comic has received an emergency reprint! Thank you to everyone who has supported us!】

Demon Lord Galtor Riesen easily defeated the female hero party that invaded his castle.

However, the kindhearted Demon Lord, who delivered the unconscious female hero back to her home, had a fateful encounter there. He fell in love with Reitia, a woman who raised the female hero as a single mother after her husband passed away.

The Demon Lord had also lost his wife in the past and had lived in solitude ever since, but in the female hero's mother, he sensed a familiar resemblance.

The Demon Lord readily received her "OK" and decided to remarry. However, the female hero, whose father suddenly became the Demon Lord, was naturally not convinced, leading to an awkward atmosphere. The Demon Lord struggles to get along with his stepdaughter and build a wonderful new family.