For everyone who experiences "no damage" bug: Play on japanese locale. This is chinese game on unity, most of them require change to east asia region of pc locale to work.
The game itself is finished only on paper, 3rd girl is not even implemented. Probably it was supposed to go into EA, but it got bonked with current Steam rules.
On side note. Did anyone try to extract assets? I wanted to get girls spires (damaging clothes and such) with AssetRipper but couldn't find them anywhere. Assuming they are locked (encrypted?) in StreamingAssets/AB folder with files of unknown extension and manifests. Have no idea how to extract those...