The Shidoshi saga reaches its startling conclusion! After finally seeing his parents reunited, Ricky Feeple bids them farewell -- perhaps for the last time -- and he, his girlfriend Sora, and his new adopted sister Bianca (who happens to be a giant mouse) set forth to find their way back through the multiple alternate realities. After dimension-hopping for eight years, they finally near their goal, the city of Quagmire, half-destroyed years ago in a dimension-rending magical explosion. Ricky's goal is nothing less than confronting Yuudai, leader of the Shidoshi, who has proven himself Ricky's superior in almost every way. But having killed Yuudai once (quickly followed by his resurrection), Ricky can't ever bring himself to take another life, so what chance does he have of defeating his ultimate foe? Collects Ninja High School #166-170.