Marco and The Galaxy Dragon .xp3 file help

[Mysticus]

So, I tried to extract .xp3 files using a program by xmoeproject called KrkrExtract, but I got no results.
Do you guys know or have some script?

[aluigi]

There is a small header with string "XP3\r\n \n\x1a" and then a sequence of png and ogg files without any information about their offset, size and name.
Do you have other files with the same name and different extension? like voice.idx

[Mysticus]

The game didn't have idx files. But sig files. Sorry.

https://drive.google.com/open?id=1RUaV3 ... AJcvtt5daY

[aluigi]

sig is for the digital signature.
Anyway it looks like the nekopara script does the job:
http://aluigi.org/bms/nekopara.bms