In this volume, Haruhiko embarks on a class trip to Hawaii with all theregulars of the series -- Yuka, his buddies and Yukanaria. Plus an all newcharacter: Haruhiko's former classmate Mana Kimura. Mana shares Haruhiko's lovefor fixing up gadgets and also has a secret crush on him What happens whenHaruhiko gets involved with demons and magical weapons right in front of hisfriends?