This game is an exploration-type action game in which the player controls Sayaka Miki to explore a labyrinth.

The player controls Sayaka Miki, who has lost her memory, and explores a labyrinth filled with mystery.

It is in the depths of a comatose labyrinth--.

......Sayaka-chan, Sayaka-chan......

I thought I heard someone calling me. Consciousness slowly rises from the depths of sleep, and Sayaka Miki's thoughts are lit.

The voice belonged to a very important and treasured friend.