Yuri is a fifteen year old high school boy sucked down a toilet to become the Great Demon Kingdom's new Demon King. This third volume starts off with Yuri in the clutches of "the three not so look alike brother's" uncle. He somehow manages to escape and divert a civil war among the Demon Tribe, then the lot travels to find the Demon Flute (which looks more like a recorder) and a man who is locked up in a neighboring country who is supposedly the Demon King. Look for Yuri in a dress, the appearance of the hot and sexy Demon King, Bando the dolphin, more jealousness from Wolfram and...wait! Are Yuri and Gwendal getting along?!