Victims of the "head dribbers", Rin and Yukishiro find themselves beheaded, but thanks to the presence of the spirit of Aira and Kawabanga, they manage to recover their body! Hardly recovered, Yukishiro finally remembers the man who threatened him and handed him a knife: Professor Murakami! Will they manage to catch this professional and settle his account?! Meanwhile, Okarun and Sakata find themselves in difficulty facing Hase, a classmate who attacks them alongside an alien from the bottom of space!