"Obey Me! One Master to Rule Them All" is a romance simulation and RPG card mobile game produced by NTT Solmare Corp. It is one of many dating simulation games from a dating sim brand called Shall We Date? Users can experience a story filled with a variety of characters. There is a phone and messaging system as well as entertaining card battles involved. Get through a series of tasks and choose how you wish to enjoy your life in the Devildom!