Overall, a good magical girl game with corruption mechanic made by a russian.
If you've played those russian made games here, you'll know they're quite different and developed from the rpg maker formula you would find. It's mechanically refreshing to play. On the other hand, thesse games are often crippled by bugs. Here's how to solve this one's main issue: the lag that stats to appear.
Ok so the options reset each time you go in and the game will lag at some point but if you crank up to 100% every option (yes even the fps counter to 150) it fixes itself... how? Russian magic I'm guessing.
Other than that, it's good, lots of ending and 4 evolution stages of corruption (stage 5 and 6 and the end zone don't go through them if you reach 6 it's instant game over) and a darkness versus light build of skills based around an arousal meter.
Honestly good game that was 100% with a darkness skill setup in less than 7 hours