Here's a little something for people still waiting for me to release the manga arc that has do with Hanyuu's past
This video contains various manga only arcs that may get animated with the game's (Umineko & Higurashi) BGM these are in Japanese but with just looking at the pics and listening to the music you'll be able to kinda tell what's going on.
Also some of these stories are kinda dark and depressing
http://www.nicovideo.jp/watch/sm2186937
Though one of them does contain Adult Satoko, Adult Rika, and Adult Keiichi and another contains Shion in Bern-chan and Beatrices' clothes
In short this really need to be uploaded to Youtube