The protagonist is Ralph Esteson, a reincarnated person. Even as a child in his past life, he had an unnecessarily sharp mind and overly keen hearing (practically superhuman hearing).... more>>

Instead of being swayed by the “World Administrator” schemes that would entice ordinary people, he used them to his advantage, taking a “cheat” as a souvenir when reincarnating into another world, and starting life anew as a baby.

He spent 15 years in the peaceful life of a fallen noble and then entered the Royal Magic Academy at 15. Two months later, he graduated early. He set "The Fastest in History” record.

After that, he became an adventurer and lived a lazy life, until he met a prostitute (the heroine) in a brothel by chance, bought her freedom, married her, and now spends his days flirting and being intimate with her. <<less

Decades ago, the Demon Lord led demons to invade the land of Burgund, and drove mankind almost to the brink of defeat. But the Demon Lord was defeated by a hero known as the Holy Knight, who brought peace to the land.... more>>

This is what is known in the land. But the truth is different.

Because at the Juvren Knight Academy, the backward student Shun has a Holy Knight father, a Demon Lord mother, and sisters with dangerous ambitions and superhuman strength.

As the sisters draw the world into one of slaughter and death, Shun promises, "I will bring back peace to the family."

To protect what is important, the weak dropout fights to become a hero! <<less