Umineko no Naku Koro ni Ep. 1: Legend of the Golden Witch

Umineko no Naku Koro ni takes place in the year 1986 during the time frame of October 4 and October 5 on a secluded island named Rokkenjima. The head of a wealthy family named Kinzou Ushiromiya, who lives on and owns Rokkenjima, is near death, and eleven of his family members arrive on the island to discuss how Kinzou's assets will be divided once he is dead. Also on the island are five of Kinzou's servants, and his personal physician. After the eleven family members arrive, a typhoon traps them on the island and shortly after people start to get mysteriously murdered.

Info Source: MyAnimeList
Download Source: Manga Traders

Note: Volume 4 also contains the tea party chapter for this episode.