The Devil is a Part-Timer! novel's Author, Satoshi Wagahara, revealed on Twitter that he will start a novel about STAR OCEAN ANAMNESIS mobile game.
He tweeted about it on December 6th, 2017.

The game's official account revealed the series's title on Twitter; STAR OCEAN: anamnesis- The Beacon of Hope - 

The Devil is a Part-Timer!, aka Hataraku Maou-sama!, is a novel series written by Satoshi Wagahara that the devil in another world comes to this world as a retreat from a battle against the hero.
The novel inspired TV anime adaptation with 13 episodes.
The 18th volume is scheduled to be released on January 10th, 2018.

STAR OCEAN ANAMNESIS is a mobile game released on December 7th 2016 for Android and iOS.

Via - Official Twitter Account:
https://twitter.com/wagahara211/status/938382047285985280
https://twitter.com/SOA_SQEX/status/938382213661450240