Title: で・る・た！ ～おねだり天使とひとつ屋根のした～ (Deruta!~Onedari Tenshi to Hitotsu Yane no Shita~
Creator: アトリエかぐや Honky-Tonk Pumpkin (Atelier Kaguya Honky-Tonk Pumpkin)
Homepage:
http://a-kaguya.sakura.ne.jp/product...lta/index.html
Release Date: Aprile 27th
Game Torrent:
http://www.hongfire.com/forum/showthread.php?t=68119
The torrent is most likely dead, don't complain if that is the case.
Didn't find any posts for this game using random parts of its name or the company...
Unfortunately, I can not find a CG pack for this, but here's the sample images. There's also a couple other transformations, e.g. shrinking. It's a Atelier Kaguya game, so one should appear somewhere. ._.