Just keeping the direct download link for the update patch posted here since the DMM Fanza page of this game needs a VPN to access. Hope this helps someone.
https://sample9.dmm.co.jp/digital/pcgame/akbs_0135/akbs_0135pt0530.zip
I didn't notice earlier, but update patch (version 1.04) was released on 2025.03.11, you can download it from here: http://www.waffle1999.com/s_file/kyonyu5_patch4.zip
Mirror: https://gofile.io/d/4fw7Ad
Not entirely sure but we might need to apply it for the DLC that was released today.
Thanks a lot man, that works really well, appreciate it a lot. I was previously forced to download Luna Translator for this one to use it's hook function but that application was pretty unstable for me and caused the game to crash often. So this is really helpful. Keep up the good work.
Update released today (Version 1.0.3): http://www.waffle1999.com/s_file/kyonyu5_patch3.zip (may need VPN to access link)
Patch notes: http://www.waffle1999.com/official/patch_.html#73 (VPN may be needed)
Mirror link: https://gofile.io/d/pnTtzT (don't need VPN)
Okay I used a better VPN service this time (one of the japan public servers from https://www.vpngate.net ) and was able to access the download page. Seems like both of the download links on that page can be accessed even without a VPN, so sharing them here...