In the distant past, Miguel, the God of Destruction, was sealed inside the knight who ruled over light and darkness, Sturmhurt. Alongside the knight was Gestöber, who accompanied him through countless battles. In the present day, destiny causes them to reincarnate as Kabuto Hanadori and Seri Koyuki, two classmates. Their reunion should be a joyous moment, if not for the fact that these fantasied heroes are just products of Kabuto's delusions. As the fictional Gestöber, Seri finds himself in various embarrassing situations due to Kabuto's antics that sometimes grow out of his control. Moreover, his classmate Utsugi Tsukimiya joins the fray with his absurdly accurate mind-reading abilities, slowly destroying Seri's social life. Seri tries hard to stay away from them, refusing to acknowledge their shenanigans, however with Kabuto's chuunibyou and Utsugi's unpredictability, he is only bound to be swept by the craziness coming his way.

As the machine war progresses, YoRHa Command and the Resistance prepare for a final decisive assault against the Machine Lifeforms, the militarized robots who roam the earth's surface. While preparations are underway, YoRHa 9-gou S-gata 9S and YoRHa 2-gou B-gata 2B continue their advanced scouting mission. However, 9S and 2B struggle with their respective roles, their loyalty to each other, and their loyalty toward Command. Although the nefarious Adam and Eve have been defeated, it appears the machines are not down for the count. An ominous presence in the form of the Red Girl continues to observe the androids from afar, waiting for the perfect opportunity to attack them.

High schooler Tomari Hinowa is called to the principal's office one day to hear some shocking news: he's getting married! A mysterious fluffy creature called Kanenogi has chosen him as their wife, and despite Tomari's initial misgivings, he decides to accept. What follows are a series of delightful tales from this new couple's monstrous married life.

After a daring escape from the Memory Museum, Sayaka Miki returns to Mitakihara City with unsettling news. Troubled by what she has learned, Sayaka reveals to Madoka Kaname and Homura Akemi the whereabouts of Mami Tomoe—but more importantly—the disturbing truth behind the existence of magical girls. Despite knowing the cruel fate that awaits them, the three quickly resolve to work together and save Mami once and for all. Meanwhile in Kamihama City, Yachiyo Nanami hunts various rumors in search of Hotel Fendt Hope, the headquarters for the Wings of Magius. The magical girl organization is Yachiyo's only lead in finding Iroha Tamaki, whose disappearance remains shrouded in uncertainty. Determined to reunite Team Mikazuki Villa, Yachiyo swears to destroy the Wings of Magius and put a stop to their insidious plans. Amid the turbulent situations, a calamitous threat approaches, presenting a dire conflict set to jeopardize the entire world.