Maebara Keitarou, Keiichi's only son, moved from Tokyo to Hinamizawa in the first year of Reiwa and was excited about his new life there as he deepened his friendship with the children of former club members who were Keiichi's friends. One day, he meets a girl with a mysterious air named Inori, and another girl who calls herself Kururu contacts Keitarou... Will Oyashiro-sama's curse transcend time and generations, and occur again in the world of Reiwa?!