Second season of Machikado Mazoku.

As part of a mysterious contract agreed upon by a goddess and his parents years ago, Makoto Misumi finds himself sent to another world to meet the goddess and become the hero. However, the deity deems Makoto to be "hideous," refusing to even lay eyes upon him and revokes his heroic title. Disdainfully giving him the ability to understand all languages except the human language as compensation, the goddess drives Makoto off to the farthest edges of the wasteland, far from human civilization. Due to the disparity between Earth and this new world, Makoto's inherent physical and magical capabilities awaken, making him extremely powerful. He meets various demihumans and mythical beings who all end up being captivated with his characteristics and join Makoto in building a new community where all of them can peacefully coexist. Nevertheless, despite this success, Makoto still yearns to meet fellow humans. In a world where the goddess herself has barred him from interacting with his kind, it is up to Makoto and his companions to fulfill his desire—and perhaps reform society along the way.

At birth, mages randomly acquire one of the four "crests" that represents the extent of their magical capability. Equipped with a crest specializing in creation, a man named Gaius reached the ceiling of his potential, becoming known as the world's strongest sage. Despite his overwhelming power, he is unsatisfied with his abilities and desires to possess the mark suitable for close combat. Knowing that a person's crest is unchangeable, Gaius decides to reincarnate far into the future, hoping to alter his fate. Thousands of years later, Gaius is reborn as Mathias Hildesheimer, successfully obtaining his long-coveted crest. However, he is surprised to learn that in these times, magic has vastly waned, and the techniques that were once widely used are now nothing more than just a speck of legend. Moreover, the crest that he painstakingly strived to attain is now considered the weakest—merely dubbed the "Crest of Failure." Nevertheless, Mathias naturally exceeds all expectations. He enrolls into the royal capital's Second Academy, acing every trial that comes his way. But soon after, Mathias discovers the dark truth behind humanity's downfall into magical mediocrity—demons—and endeavors to remedy the consequence of his millennia-long absence once and for all.

Despite a rough start, Makoto Misumi's life in another world takes a positive turn when he meets more demihumans who recognize his presence. Now as the leader of a fast-growing demihuman community, Makoto wishes to make human society more accepting of them and thus builds a business showcasing the demihumans' abilities. To extend his reach further, Makoto enrolls at the Rotsgard Academy to learn magic and expand his business venture there. Meanwhile, the goddess who summoned and forsaken Makoto had brought two other people to her world shortly after sending him away, making them heroes of their respective nations. Given enough time, Makoto's path will intertwine with both of these heroes, which may cause the world to take a drastic direction.