Gensokyo-Kokusho Skirmish

Few months after Historia-Equinox War, Historia Gensokyo received a challenge from Kokusho, a previously unknown realm within Historia Universe. As it turns out, Gensokyo isn't the only one, since Netherworld, Makai, and Abendrot also received the same challenge. The Union now prepare themselves for a possible conflict/incident. Minor cross-over elements present.