It's now up to Koichi and the rest of JUDA to hold back the launch of the SPHEREs. However, Yamashita has a different mobilization unit out, after receiving a letter designating him to fulfill a special duty surrounding a secret reunion around the base of Mt. Fuji near the Aokigahara Sea of Trees. As Koichi races towards Yamashita, he is completely unaware of what is awaiting for him there.