The player takes on the role of the MC (short for Main Character; can be also referred as Protagonist or Heroine), the main female protagonist of Mystic Messenger. After accidentally getting involved with the RFA, she takes on the job of former member and founder Rika to organize a party and invite guests.

During the process, she will be able to romance with one of the six main characters of the game throughout the eleven days of planning and conversing with the characters; depending on which route you're on.