So You're the Perp!

Fighting the Severed Head Dribblers alongside Rin, Aira asks her to widen the reach of her gravity. Rin says her power only covers a small zone, which Mai blames on her underdeveloped delivery of the song. The pair shift their focus to finding Koki, but Mai reveals Koki is also a floating head, hidden among a cluster of pygmies that only Mai can see through. Mai briefly leaves Rin, who is helpless without her, to direct the pygmies in lining Koki's head up beneath the hoop. The trick works: Koki wakes restored and Aira pulls her free of the Dribblers.

Shaken at first, Koki is reassured by Aira and names Murakami as her blackmailer, the teacher who has been combing the social accounts of female students who broke school rules, especially those posting revealing photos. Disgusted, Aira readies herself to corner him in the gym. Rin warns that the Dribblers are swelling in size, the walls are pressing inward, and her gravitational range keeps narrowing. Worse, Mai tells Rin she cannot keep singing much longer and has only five minutes of power left. Overwhelmed by the thought of guarding both Rin and Koki against giant foes, Aira asks Koki to send the pygmies hunting for Murakami inside the gym. The chapter then reveals Murakami is actually back in his apartment, calmly pedaling an exercise bike as he observes the fight.

Released March 11, 2025 in Volume 22, this Kozuka Knives Arc chapter of the Ultimate Yokai Saga continues the Aira's Group vs. Severed Head Dribblers battle. It confirms Murakami as the culprit and reveals he is observing remotely rather than fighting in person.