Awaken the taboo existence and fight against the unknown disaster; welcome to the school, "Secret Keeper."

The world is dying. Hundreds of years ago, the phenomenon known as "Melt and Erosion" came quietly. Life, reason, memory—everything that humans have given "meaning" to—was gradually erased in the erosion of all traces of their existence. And people remain oblivious to this silent catastrophe.

Faced with this secret and unspeakable disaster, Missaga University, as one of the few insiders, is determined to awaken the power that shares the same origin as the disaster. They aim to connect humanoid weapons wandering on the edge of madness to resist this looming, colossal crisis.

If everything will eventually be forgotten, are you willing to carry the secret and move forward as proof of the world's existence? The tombstone stands as evidence, and may the silver key guide your way forward.

Welcome aboard, Keepers of Secrets.

Living in the foggy landscapes of England, you carry the secrets of the times through life and death. Amidst the melting crisis, elegance and power go hand in hand. Assemble your own card lineup and awaken those who share the same source of disasters.

Engage in Roguelite gameplay to break through levels and use strategies to uncover taboo truths. Experience a unit-style plot as you pursue the truth in a broken world.