なぜ異世界ダンジョンでスマホがつながるのか~竜胆遥人の迷宮攻略〈ジェイルブレイク〉

'LuVYRINTH' a dungeon exploration game where one must rely on their smartphone in order to conquer dungeons. This is the game world that a highschooler Rindou Haruto suddenly found himself within. A game where one's stamina is equivalent to one's smartphone battery life, and when this meter hits zero, 'disqualified' monsters and other features would run wild and take control of the app. The clear to clearing the dungeon is his exclusive 'One Off App'. (Source: Japanese publisher, translated)