Haunted by a past he cannot change and a future he's too afraid to hope for,
Kaoru Kurokawa returns to his hometown for high school, accompanied only by his mute younger sister — choosing a life apart from their distant parents.
Burdened by guilt and the remnants of fractured family ties, the siblings lean on each other—each a refuge for their mutual scars.

During the fateful summer of his junior year, a chance encounter with a peculiar classmate draws Kaoru into a series of inexplicable events — and into the orbit of the mysteriously detached beauty, who seems to carry secrets that defy the bounds of reality itself.

As unseen hands begin pulling at the threads of their fates, Kaoru and his classmate must confront the ghosts of their pasts—and the haunting cost of challenging what lies beyond.