Title: 月英学園 -ergO-
Release Date: 2011-12-31
VNDB : https://vndb.org/v9774
official website : https://www.arcsystemworks.jp/steam/getsueigakuen/jp/
and
Title:月英学園 -kou-
Release Date: 2013-10-10
VNDB : https://vndb.org/v18642
All link in website is dead here...