In the first year of Reiwa, Keitarou Maebara moves from Tokyo to Hinamizawa. He is excited about his new life in Hinamizawa as he gets to know the children of the former club members. Then one day, he meets a mysterious girl named Inori, and another girl who calls herself Kururu contacts Keitarou... Oyashiro-sama's curse transcends time and generations, and will happen again in the world of Reiwa...?