When Mana visits GeGeGe Forest, she finds Kitaro and Ratman arguing over something trivial. They each declare for the I-don't-know-how-many-th time that they're cutting ties with each other. Meanwhile, in town, the water has been contaminated sending everyone running around looking for drinking water. No one knows why the water is polluted, and no attempts at purifying it work. Kitaro believes that the one behind the pollution incident is one of the Four Generals of Betrayal. Kitaro begins an investigation, but doesn't know how to stop the pollution of the water. Meanwhile, a survivor of the Way of the Demon Society, Isurugi Rei, begins to move again...!?
You think a half-yokai like you
can change the human world?
أتعتقد أنّ نصف يوكاي مثلك 
يمكنه تغيير عالم البشر؟
Du denkst, ein Halb-Yōkai wie du
könnte die Menschenwelt verändern?
¿Crees que un medio yokai 
puede gobernar el mundo humano?
¿Crees que un medio yokai
puede gobernar el mundo humano?
Tu penses qu’un bâtard comme toi
peut changer le monde des humains ?
Pensi che un mezzo yōkai come te 
possa cavarsela nel mondo umano?
Acha que um meio-yokai como você
pode mudar o mundo humano?
Думаешь, полу-ёкай сможет 
изменить мир людей?