Yuuto has been taking care of his step-sister Kaori since the passing of their parents. Their life is hard, but they are happy together - at least until they are transported to a parallel world where he can't even understand a single spoken word. His sister is taken prisoner and her captors force him to fight wielding a sword that tries to control his mind.

The Princess Waltz - a dance of whirling blades held to find the princess worthy of becoming queen of Seven Central in the fantasy world of Eldelant. Hopeful candidates travel from all the kingdoms of Eldelant to take part in the waltz, but only one princess will reign supreme...

Kazuto went out to catch a thief that had broken into the local Chinese history museum late one night. But after a sudden confrontation with the thief, he finds himself absorbed in a white light only to awaken in a wasteland. What's happened!?

Fuyukawa Kokoro's plane crashes in the mountains in the middle of a snowstorm. Of the 31 passengers, only she, Kusuda Yuni, Yomogi Seiji, and Mayuzumi Lin survive unharmed. Unable to establish communication with the outside world, the four decide to take shelter in an empty cabin and wait until the storm passes.