At a conference among industry leaders in Kaii countermeasures, Shigemoto's "Alice System" is rejected due to lack of proven results. He takes on a massive yet dangerous new project for himself to prove his abilities while questioning the industry's power dynamics and expectations. Meanwhile, a certain individual approaches Koshigaya with a suspicious proposal, putting her father on shaky ground.

Kana and Koshigaya visit the RIMT to investigate and exterminate a new Kaii species. Guided by Vice Chief Akasaka, they face a bewildering and seemingly invincible Kaii specimen defying all common sense. Behind the scenes, ulterior motives surrounding magic power regulations cause tension as the Kaii unexpectedly mutates. With a strict time limit, Magilumiere's skills are put to the test.

Magical Girls from Magilumiere and AST simultaneously face a rampaging new Kaii species. Koshigaya extends an olive branch to Tsuchiba, resulting in a clash of opinions that only sparks tension between their companies. The unknown Kaii rapidly mutates under the influence of magic power, after which a certain individual takes control as operator for the do-or-die battle ahead.

An improvised collaboration between Magilumiere and AST engages in a do-or-die fight against the rapidly mutating Class C Kaii. Magilumiere's fluctuating defensive and offensive tactics upset conventional methods as Kana gathers real-time data during battle to take control. Through physicality, precise control, and high-level guidance, the seemingly unbalanced team devises a plan to counterattack.

Magilumiere begins recruiting engineers to promote the Alice System. Kana struggles to convey the company's appeal while overseeing the interview process. This causes unexpected personnel to assemble, bringing the team a fresh atmosphere. When securing more talent proves difficult after serious attempts to strengthen their combat potential, Magilumiere heads to Kyoto for lectures and interviews.

In Kyoto, Magilumiere meets engineer candidate Yamimori, who boasts impressive skills but struggles with cooperation. While compatibility with the team is called into question, he appears to be hiding certain feelings about his childhood friend Sakae and his personal values. Meanwhile, during a festival at Tonomori Shrine, a ritual unleashes a Kaii while an ominous shadow lurks behind the scenes.