Leon, a boy born as an illegitimate child in a provincial noble's household.

Scorned by his stepmother and elder brother, and enduring a life of hardship, he one day recalls that his previous life was that of a legendary hero.

He quickly leaves his family home, disliking the stoic hero's life he led in his past, and this time endeavors to live freely and as he pleases. Furthermore, believing "There's no Demon Lord, and no need to grow any stronger," he acquires three non-combat jobs: [Trainer], [Chef], and [Playboy] —

—Before he knows it, he has powerful allies and monsters under his command, and he himself has become even stronger than in his previous life…!?