Five people gather in the mountains to conduct a survey. There, Misaki meets Yanagida, who looks like his missing lover Kousaka. But with no memories of the past, can Yanagida really be the one Misaki used to love!? A notice of personal change cuts the team down to four, and a suspiscion arises that there may be a spy in their midst! Plagued by doubts, who do these men truly love? And who is the real spy?