Seven years since the ghost girl disappeared from his existence, Teiichi goes back to the abandoned remains of Seikyou Academy.
The corridors are empty. The mirrors shattered. The world went on.
But she didn't.
Yuuko, the enigmatic ghost of his teenage years, reappears — unruffled by time, yet tied by something greater than memory.
And this time, she's not alone.
As twilight falls and the past returns to haunt him, the boy who loved a ghost must come to terms with a more ominous truth:
Some promises survive even the afterlife.