mily moved to the city from the mountain village of Hinamizawa. Natsumi has become acquainted with her new life, surrounded by friends, living peacefully from day to day. But a special breaking news report one day will change everything. A toxic gas disaster has occurred at a rural village. And the village that got caught in the disaster is Hinamizawa, where Natsumi's family used to live. Shocked by the incident, Natsumi's grandmother tells her "this is Oyashiro-sama's curse." What is this "Oyashiro-sama's curse" that grandmother is speaking of...?