Phew, finally finished it.
Though I still have to max out the moves, maybe make a video showcasing the moves (though I can only record directly from my phone...), and finish the remaining dungeons and 100% some stuff.
Anyways, the IP is owned by Arc System Works (who seems to have nothing big except Ble-Blue or whatever that fighting game is) and developed by Intense.
It is sometimes translated as Stardust Amazoness, though Seisou can have a deeper meaning than that, sometimes referring to Time. Anyways, it'd take a long time to explain, so I'm just going by the Japanese name.
Oh, and I do avoid major spoilers. Play the game yourself if you want to know.