Shiraishi Gomichi seems like your average high school student, but he harbors a remarkable secret – memories of his past life as a hero who saved a different world. When Mai Shiina, a transfer student, arrives, everything shifts. Both Gomichi and Mai share a reincarnated past where she, a former witch, and he, a hero, clashed in epic battles. However, as they navigate their current lives, Mai's declaration that she cannot live without Gomichi throws his ordinary existence into disarray. What destiny awaits these intertwined souls in their new reality?