Xia Mu, who lived a busy life between people and monsters, occasionally reunited with his former classmates, thus recalling the bitter memories of being haunted by monsters. At this time, Xia Mu got to know the female Jin Village Rong Lizhi who appeared in the memory of the monster who returned the name. She, who met Reiko, is now living a stable life with her only son, Starling. Xia Mu became peaceful through communication with them. But the town where the mother and son live seems to be lurking mysterious monsters. After the return of the investigation, the "demon seed" parasitic on the cat teacher's body grew into a tree and bore fruit overnight in the Fujiwara family's courtyard. And the cat teacher who ate the fruit similar to his own, unexpectedly split into three -!?