I tried it on the archive.rpa of that game: https://hyao.itch.io/lustful-desires
I used the console because just dragging wouldn't work and I got:
Traceback (most recent call last): File "rpaextract.py", line 359, in <module>
File "rpaextract.py", line 64, in __init__
File "rpaextract.py", line 223, in load
File "rpaextract.py", line 103, in extract_indexes
File "encodings\zlib_codec.py", line 43, in zlib_decode zlib.error: Error -3 while decompressing data: incorrect header check [8376] Failed to execute script rpaextract
Any idea what could be causing this error ?