Umineko no Naku Koro ni Saku(Switch) .bup files

[Lancher]

Hello there! This game consists of some .pic, .bup, .nxa, .msk files. I've tried enter-extractor which can decrypt such files from Higurashi (another game made by the same company). It works well with .pic files, but it seems that it doesn't work with .bup and .nxa files. I don't know much about file decryption. Can somebody take a quick look?

I think the bup files may contain multiple pictures and nxa files may contain music files.

Thanks for your help!

Here's one of them.

files.zip

[spiritovod]

@Lancher: That attachment is not available due to recent problem with attachments, please reupload it, in case if someone else will decide to take a look at it.