Japan-based game developer Silicon Studio will be making a mobile game based on the Trinity Seven TV anime series. The game is currently scheduled for release in 2018, although it does not yet have an official title, nor is the genre known. It will be revealed soon, however.
So a little background that needs to be taken out of the way. Trinity Seven is originally a Monthly Dragon Age’s manga written by Saitou Kenji which was first published in January 2011, and is still ongoing. The story follows a certain Kasuga Arata, a 17-year-old teenager living with his cousin Kasuga Hijiri. A series of events lead to Hijiri disappearing. As Arata searches for her, he encounters the Trinity Seven, a group seven female mages who help him on his mission. Among other things. Be sure to drop by the official site for more details.