In a mythical realm, Demon Lord Benes and Hero Shirene Feniche clash in a fateful battle that leads to their untimely demise. However, their journey doesn’t end there. Reincarnated by the Creator God Zekar, they are reborn as twins in 1987’s Japan, far from the fantastical world they once knew. Now facing an entirely different challenge, the formidable Demon King and valiant Hero must navigate the complexities of everyday life as elementary school students. Yet, amid the struggles of adaptation, a heartwarming and humorous tale unfolds as these once fierce foes find themselves living as a family, striving for peace and normalcy in Japan.