"Resonance Reborn" follows the story of Nagi Ishikawa, a quiet and introverted high school student with a profound love for modern music and Japanese rock. Despite his reserved nature, Nagi possesses an extraordinary talent for singing and playing various instruments, which he mostly keeps hidden from others. One fateful day, Nagi decides to step out of his comfort zone and showcase his musical abilities by performing at his school's cultural festival. The mesmerizing melodies he weaves captivate the audience, earning him both admiration and envy from his peers. Unbeknownst to Nagi, the boys of the light music club, unable to handle his talent and popularity, decides to end his life then and there. In a shocking turn of events, Nagi's life is tragically cut short, as he is killed by the boys in the light music club, leaving his dreams and aspirations unfulfilled. However, his journey does not end there. He reincarnates into a completely new world as a humble peasant named Martis. As Martis begins to explore this new realm, he realizes that the world he now inhabits is devoid of the vibrant and captivating music he once cherished. The instruments available are rudimentary and lack the soul-stirring qualities he yearns for. Determined to bring the beauty of modern music and Japanese rock to this world, Martis sets out on a mission to introduce new melodies and instruments to the people. Through his travels, Martis encounters various challenges and obstacles. Along the way, he meets like-minded individuals who share an interest for rock and aid him in his quest. Together, they strive to revolutionize the stagnant musical landscape, blending the melodies of his past life with the cultural traditions of the new world.