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.

Shall we date?" 's latest game. A series of romantic school life 7 charming demons! And Japanese voices that will make you melt!

A brand new gaming experience

What if the character could come to you, laugh and cry with you, and become your friend?

"Obey Me!" is a simulation game that makes characters a part of your daily life.

You will receive regular text messages and phone calls from charming characters.

There is an in-game intimacy level system. The way you interact with the characters will affect your relationship with them.

 There is no gender selection for the main character, so anyone can play.