Kells, the late-in-life son of a common farmer, forges a pact with an unknown creature—a Fatty Dragon—and thus embarks on a fantastical comeback journey. His future dream is to collect... panties... from beautiful women of every race in the world. Oh, but his dream beyond the panties is to establish a harem mercenary group in the truest sense of the word! He will leave behind countless lewd and joyous adventure stories across the infinitely vast otherworlds.
Full of laughter and comedy, passion and hot-blooded action, love and justice, he will constantly grow to understand the true meaning of his dream. By swindling and deceiv... wait, no! By using a sincerity called "love," he will win over women from all over the world to form his great harem mercenary group! He will firmly adhere to his own "My-Style Harem Aesthetics": never let a single woman shed a tear!

And so, as life blooms like a flower, the dreams of a pervy man and the bonds he shares with the maidens intertwine. Crossing time and space, he begins the journey of a legendary lifetime...