Seven idols return to their office on Christmas Day to find something impossible waiting for them. The Wall, that mysterious barrier that defined their entire existence, has reappeared in full force. But this time, the circumstances feel different, wrong even. The questions that haunted them before have multiplied into something far more complex. Tension ripples through the group as they grapple with what the Wall's resurrection means for their future. To cut through the anxiety, Sakura suggests doing what they do best: coming together for a celebration. A Christmas party becomes the gathering place where the members can reconnect, laugh, and momentarily forget the inexplicable phenomenon surrounding them. This single episode strips away the usual idol framework and focuses instead on the human core of the group. It's intimate, reflective, and grounded in genuine camaraderie even as unsettling questions linger in the background. The special captures that rare balance between light moments and deeper mystery, letting you sit with characters you care about while the strangeness continues building around them.