Link: http://www.dlsite.com/maniax/work/=/product_id/RJ204485.html
Someone already bought it and uploaded it at https://rg.to/file/5183e834f88cb2e222fe27389f128f14/RJ204485-170818.zip.html, but the link requires a premium Rapidgator account. Anyone with a premium RG account want to download it...