Mibayashi Haruno is an ordinary high school girl—cheerful, optimistic, and hardworking. Behind her simple everyday life, however, lies a secret even she doesn’t realize. Since childhood, her grandfather had always told her that she possessed a “great power” she must never reveal. Haruno never understood what he meant… until one day, that power awakened.

From that moment, everything changed. The foreign personalities she had long suppressed began to rise—each with a unique ability of its own. Haruno finally uncovers the truth sealed deep within her soul, that she is not just a girl with multiple personalities, but a medium, a vessel for the restless spirits bound to her existence.

Now, as the boundary between the human world and the spirit realm begins to crumble, Haruno must learn to control her power—and herself—before the strongest spirit within her awakens and consumes everything.