A powerful tamer known for the strength of his companion beasts dies in a freak accident involving storage magic and is reincarnated in another world as a young boy named Varius. In his original world, taming was a respected and elite profession, but in this new realm, tamers are regarded as the lowest of the low, looked down upon by society. Shocked by this status reversal, Varius discovers that he has retained the knowledge from his past life as well as some of his stored items, including a telescoping staff and a flying cloud. Using his previous expertise, he applies unique buffs to his beasts, reclaiming the ultimate power he once possessed. Determined to prove that the tamer profession is truly the ultimate calling, Varius sets out to change the world's perception. He tames a three-horned stag beetle, evolves it into a formidable partner, and enrolls in a local tamer training group, which he finds lacking compared to his old methods. With his overpowered abilities and accumulated experience, he aims to overturn the very foundations of this new society, eventually setting his sights on magic school as the next step in his journey to elevate the tamer class.