【Request】Decryption And Extraction Of Game Archive Files Of Android Mobile Games

[Parasite]

Hello.
I submitted a request to github once, but they said it was difficult to respond, so I was referred to this site to ask/request.
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●A.OBB_Files:[グリパチ]パチスロ戦国乙女 暁の関ヶ原-DARKNESS-
https://apkpure.com/%E3%82%B0%E3%83%AA% ... p.he145001
This file must be extracted from the VCKT file.
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If anyone has the keys to the above two USM files and the HCA file or can decrypt them, please let me know. Or, if you can decrypt them, it would be very helpful.