Nina Tamaki

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. [Written by MAL Rewrite]

Individual pieces of human emotion usually take form as flowers known as "Fragments." The select few who possess strong enough Fragments can become "Reflectors," beings who equip specialized rings that allow them to connect their thoughts, memories, and emotions to those whose feelings waver. There are two types of Reflectors—those who wear blue rings to protect those falling into depravity by preserving their Fragments, and those who wear red rings to prevent negative emotions by stealing the Fragments of those who begin to develop severe woe. Despite wanting to socialize with people around her, transfer student Ruka Hanari's shy and introverted personality always gets in her way. In a chance encounter, however, she bumps into a woman who happens to drop a blue ring as she hurries away. Unable to return it, Ruka brings it back with her to her dorm. There, she meets the outgoing Hiori Hirahara, who also has a blue ring. They find themselves in several conflicts against red Reflectors, slowly realizing the true power of the rings that they hold. Now striving to become Reflectors themselves, Ruka and Hiori must learn to work together and become stronger so that they can save not only the people around them, but also themselves from the emotions that hold them back. [Written by MAL Rewrite]