Itadori Yuji (25) and Fushiguro Megumi (25) have known each other since middle school, two souls bound by fate as fated mates in a modern omegaverse world. After graduating high school, Yuji works at a small-to-medium enterprise, his natural warmth making him the company’s top salesman. Megumi becomes a section chief in the development department of a major pet food company, quiet yet steady in his devotion. Despite their different careers, they live together, tied by an unspoken promise and instincts that neither can resist. When Megumi’s heat triggers Yuji’s own, their bond is tested between instinct, tenderness, and love that transcends logic. Even after 143 years, their hearts still find each other, again and again.