Kadokawa Games announced the release of an extra content included DLC for the Demon Gaze 2 PS Vita game which released on September 29, 2016 in Japan.
The DLC release on October 21, 2016 in the Japan PSN as a FREE TO DOWNLOAD DLC.

It should be noted that if you want to play with the included contents first you have to clear the main story of the game.
With the DLC the maximum level will be increased to 90 (normally it is 55) and you will get several extra powerful weapons and items with it.