Help with unknown compression in Sengoku Basara 2

[Alpha 1001]

Hi guys, someone can create for me a decoder to decode this file or maybe a bms script?
https://drive.google.com/file/d/12SOsJxcs7536JSJ2iv_nbcAJL7SUopim/view?usp=drive_link
There is some visble strings of uncompressed content. The original algorithm is the yz2, but this game version uses a custom compression, maybe an lzss variant. I have the encoder and decoder for the yz2, but for this game the yz2 compression has been replaced with a custom compression as I said.

I can read the zsize and unpacked size fields from header with this C code:
#include <stdio.h>
#include <stdint.h>

int read_header(FILE *fp, uint32_t *packed_size, uint32_t *unpacked_size)
{
char hdr[33];

if (fread(hdr, 1, 32, fp) != 32)
return -1;

hdr[32] = '\0';

unsigned int a, b;

if (sscanf(hdr, "%x%x", &a, &b) != 2)
return -1;

*packed_size = a;
*unpacked_size = b;

return 0;
}

Edited yesterday at 11:27 AM by Alpha 1001