Mana has gone camping with Souma, Hiroto, Yuuta, and their father Yuuichi. Though Souma and Hiroto's horseplay is exasperating, Mana enjoys her holiday. But that night, Yuuichi suddenly disappears. When Souma and Hiroto go looking for him, they are attacked and kidnapped. As an eerie laugh echoes through the space, Mana and Yuuta wonder if it might be the work of a youkai. They hurry to tell Kitaro, but...!?
