I've seen the video...
... and there's some screens floating about and there's even a Facebook page, but I really don't have the faintest idea exactly what this game, developed by Gust, is.
Apparently you need to raise the doe-eyed young lady in some fantasy world but that's pretty much it on the info front. Sounds unlikely to get a western release, but that's no excuse for some better info not being available.
There's a Flash site here showing a release date of the end of April but not much translates so I can get the slightest idea what the game is really like. Update: Found an oldish story here that hints at some of the gameplay.