Princess Evangile has been recently released on Steam. The game is a visual novel about a lone boy in a prestigious girls' academy. Current special 10% off release price is $31.49 or ¥3783.11 until April 3. For more details, check out the store page. Here's the opening.
Manga Gamer: http://www.mangagamer.com/detail.php?goods_type=1&product_code=117
Note: Steam version is the censored version. Uncensored version can be bought on Manga Gamer.