I got the goddamn Unity Project out of it because I want Haneko's Model (but it's obj on AssetStudio... So no armatures?)
I never saw option to rip the armature but its not a problem to make your own.
I knew it! OBJ does not support Armatures. AssetRipper (For Linux/macOS/Windows users) uses GLB to extract!
Also, I had an Idea to port this game to Linux. but i refused because Unity Hub needs chrome.