ラストピリオド ラストピリオド-終わりなき螺旋の物語- ラスピリ
Last Period (full title is "Last Period -Owarinaki Rasen no Monogatari-") is a game for Android and iOS by Happy Elements, released on 10.05.2016 (11.05.2016 for iOS).
An official novel (ラストピリオド 終止符の約束; Last Period Shuushifu no Yakusoku) was released by Media Factory in January, 2016.
An anime adaption has begun airing in Spring 2018.