Ephemeral Fantasia is a RPG in which the main character, Mouse, finds himself trapped in a time loop. A musician, he was supposed to play at a wedding happening on an island, but the groom, Xelpherpolis, cast a spell, making Mouse relieve the same five days, over and over. What makes matters worse, Xelpherpolis is draining the life force from all the island inhabitants.
Similar to The Legend of Zelda: Majora's Mask, the time loop is not just part of the story, but an important aspect of the gameplay. Certain events will only happen on a specific date, making it necessary to be in the right place in the right time, or else the player must wait a in game week to lapse to have a chance of doing what must be done again.
Combat is random and turn based, with ten characters total that can be recruited to Mouse's party.