Winter has covered Shuriken with its coat of snow and fog. Visibility is down to a bare minimum and the fog lends a scary appearance to the smallest of bushes. How will the students be able to take their important end of term practical exams in weather like this? The Principal moans, but Kita, as she's flipping through one of Eizan's books, has an idea... The next day, without knowing how they got there, the students wake up to find themselves aboard the "Black Dragon", a vessel on course for... the domain of the Master of Terrible Darkness!