Bought it, played it for a bit. NOTE: I can't read japanese and I don't use any translating software, haven't gotten around to setting it up, so I won't talk about the story, not that it seems to be anything complex.
TL;DR: Gameplay, nothing special, likely large amounts of spaghetti code. Solid art and lots of bondage, though.
After the intro, you talk to a secretary/advisor girl and are brought to the map where you pick your targets, though there is only one target at the start. Not sure if you will actually have a choice at some point.
After choosing your target, you march out to fight your way there. There are a few groups of enemies blocking your path on the map, you fight them and eventually reach your target, which I assume is a boss fight. The combat is basically the same as previously, as expected, unfortunately that includes the choppy animation (maybe it's just a problem with my pc, it is pretty shit). I messed around a bit using translator++seeing if I could make a partial for the game. I didn't mess around for long, and I am far from an expert, but the patch borked something in the game, causing characters to spawn in different spaces during the intro, and causing a permanent black screen after said intro, making progressing impossible. Maybe it's the program I used but I couldn't access all the data, and the fact that the intro borked so easily leads me to believe that there is alot of spaghetti going on.
Now for the good parts.
The art is (imo) really solid. Sound effects are on point. Lots of bondage. These are things that I highly value, and makes up for the bad things previously mentioned for me.
Another thing worth mentioning is that while messing with the data, I found some stuff indicating that there might be some light army management, where you send them on missions and stuff. (have yet to see any actual indication of this in-game, however)