It works on 99% of encrypted XP3 files where static decryptors fail. The downside is you must play the game to extract all assets (time-consuming).
To get to those exclusive assets, you’ll need a dedicated unpacker. Here are the most reliable options used by the community: xp3 extract exclusive
The most radical method is runtime extraction . Instead of opening the archive, you patch the game’s memory as it runs. Tools like KrkrExtract (by xmoeproject) hook into the Kirikiri engine process. It works on 99% of encrypted XP3 files