Yamishibai: Japanese Ghost Stories S05E07 - Hide-and-Seek

The story of a family visiting the countryside. The grandma tells her grandson Takeshi that he must not go near the house with the mountain behind it. But Takeshi, during a game of hide-and-seek with his cousins, disobeys his grandma and enters the forbidden house. From there, Takeshi is led into a world of darkness.