Based on the murder-mystery style doujin (amateur created) visual novel series produced by 07th Expansion.

The village of Hinamizawa has a population of 2000. Here, the sounds of cicadas can be heard in the late evening. Though at a first glance the village seems normal, however, here is where lies a horrible secret which the villagers try to keep secret from newcomers. The curse of Oyashiro-sama. Unusual murders have been occuring ever since the dam construction plan. Is it a coincidence or part of a plot taken place.