Whoa, this is a pretty damn old game...
For the people that don't stick their nose obsessively into Tsukinomizu game, this game was originally released in 2012 and it received zero updates. This is the circle's second game. If parts of the gameplay seems familiar... well that's not surprising, because several newer games have already been translated.
Lily Knight Saga and Naedoko Demon's Ground are both in the same universe, btw, and both are translated. Both have certain elements of gameplay that exist in this game, though you could say that they focus on different halves of it. So if you've played both of those like me, this will seem familiar in some ways... but less polished, because, again, this is literally the second game this circle ever made.
I don't remember if Lady Knight Saga, the 1st game, ever got translated properly... Should probably look into that before playing this one.
Also, no, Nightmare Girls (or Into the Nightmare as Kagura called it) is not in the same Universe, but it's by the same circle.
Still, gonna be diving into this one soon. Old game or no, I like Tsukinomizu's weird universe, and seeing more of it is always fun. Maybe one day I'll get to grab all the games in order and play them from top to bottom.