Yuuki Yuuna wa Yuusha de Aru -- not good!

import os,sys,struct,zlib

def get_data(filename):
    totalbytes = os.path.getsize(filename)
    infile = open(filename, 'rb')
    totalfiledata = infile.read(totalbytes)
    return totalfiledata

if __name__ == '__main__':
    filedata = get_data(sys.argv[1])
    xor = 0xAFDD92A7
    filecnt = 0

    #some unknown dword at 0x0
    #2 more umknown dwords at 0xd6 and 0xda
    #in between is table of contents I assume, 0x15 bytes for each, all crypted,
    #except first dword used as a key

    for i in range(0x4,0xd6,0x15):
        newfiledata = ''
        key = struct.unpack('<I',filedata[i:i+0x4])[0]
        key ^= xor

        if filecnt == 0: #done
            for a in xrange(0xde,0xde+0x6048,0x4):
                newfiledata += struct.pack('<I',struct.unpack('<I',filedata[a:a+0x4])[0] ^ key)
            newfiledata += filedata[0xde+0x6048:0xde+0x604b]

        elif filecnt == 1: #done
            for a in xrange(0x6129,0x6129+0x4c8,0x4):
                newfiledata += struct.pack('<I',struct.unpack('<I',filedata[a:a+0x4])[0] ^ key)

        elif filecnt == 2: #done
            for a in xrange(0x65f1,0x65f1+0xc,0x4):
                newfiledata += struct.pack('<I',struct.unpack('<I',filedata[a:a+0x4])[0] ^ key)

        elif filecnt == 3: #done
            for a in xrange(0x65fd,0x65fd+0x1324,0x4):
                newfiledata += struct.pack('<I',struct.unpack('<I',filedata[a:a+0x4])[0] ^ key)
            newfiledata += filedata[0x65fd+0x1324:0x65fd+0x1326]

        elif filecnt == 4: #done
            for a in xrange(0x7923,0x7923+0x2008,0x4):
                newfiledata += struct.pack('<I',struct.unpack('<I',filedata[a:a+0x4])[0] ^ key)
            newfiledata += filedata[0x7923+0x2008:0x7923+0x2009]

        elif filecnt == 5: #done
            for a in xrange(0x992c,0x992c+0x170,0x4):
                newfiledata += struct.pack('<I',struct.unpack('<I',filedata[a:a+0x4])[0] ^ key)
            newfiledata += filedata[0x992c+0x170:0x992c+0x171]

        elif filecnt == 6: #done
            for a in xrange(0x9a9d,0x9a9d+0x2618,0x4):
                newfiledata += struct.pack('<I',struct.unpack('<I',filedata[a:a+0x4])[0] ^ key)
            newfiledata += filedata[0x992c+0x170:0x992c+0x171]

        elif filecnt == 7: #done
            for a in xrange(0xc0b5,0xc0b5+0x276C,0x4):
                newfiledata += struct.pack('<I',struct.unpack('<I',filedata[a:a+0x4])[0] ^ key)
            newfiledata += filedata[0xc0b5+0x276C:0xc0b5+0x276D]

        elif filecnt == 8: #done
            for a in xrange(0xe822,0xe822+0x228C,0x4):
                newfiledata += struct.pack('<I',struct.unpack('<I',filedata[a:a+0x4])[0] ^ key)
            newfiledata += filedata[0xe822+0x228C:0xe822+0x228f]

        elif filecnt == 9: #done
            for a in xrange(0x10ab1,0x10ab1+0x184,0x4):
                newfiledata += struct.pack('<I',struct.unpack('<I',filedata[a:a+0x4])[0] ^ key)

        else:
            print 'unknown file key: %x' % struct.unpack('<I',filedata[i:i+0x4])[0]
            sys.exit()

        print 'File %d key %x' % (filecnt,struct.unpack('<I',filedata[i:i+0x4])[0])
        newfiledata = zlib.decompress(newfiledata)

        outfile = open('File_%d.txt' % filecnt,'wb')
        outfile.write(newfiledata)
        outfile.close()

        filecnt += 1