In a world where one's entire life is determined by contracts with magical beasts... Zeke, a pauper who formed a contract with the weakest of them all—a [Slime]—lived a life filled with regret and scorn from those around him. He eventually grew old and met a despairing end… or so he thought, until he found himself regressed to his childhood! Determined to give [Fios]—the only partner he truly connected with in his previous life—a better fate this time, Zeke resolves to turn his life around. Aiming to rise from a slum cleaner to the head of a grand merchant association, he sets his sights on the slime's \ability to dissolve anything.\ What's more, it seems his slime partner also possesses a hidden power…? This is a miraculous \relife\ fantasy, where the regressed, weakest duo will dissolve the darkness of their world!