I saw that it seems to be really rare and difficult to find.

However, I think that this (https://www.japanzon.com/en/game/1589--d3publisher-vamwolf-cross-normal-edition-psvita-software--4527823997882.html) is the one you are looking for according to the serial number (VLJS-00108).

The only problem is that it is really pricey.