This is a proxy for DMM's version of [Flower Knight Girl](http://www.dmm.co.jp/netgame_s/flower-x/). Currently its main feature is providing a way to use parts of Nutaku's translations (or user-provided translations) in the DMM version.
**Update:** The FKG devs have effectively said using a proxy like this for translations won't get you banned, but is unsupported. ([source](https://archive.fo/xldq7#post1213188))
This is most likely against DMM's or FKG's ToS. Use at your own risk. That said, it should be unlikely that you'd get banned for using this, since it shouldn't be detectable from their side.