Visual novel by "Red Zone":https://vndb.org/p703. Artist: [[saburou_(minami_makoto)|Minami Makoto]]. 

Full title: Mura Matsuri Momoiro Kikou - Onogoro-mura no In Matsuri, Ikenie ni Natta Shoujo
[村祀り桃色紀行 おのごろ村の淫祀り、生贄になった少女]

"Official Website":http://rzone.jp/onogoro/index00.php
mura matsuri momoiro kikou