Unaired episode bundled with the ninth light novel volume of Kuusen Madoushi Kouhosei no Kyoukan.

Second season of Tiger & Bunny.

Kokone Morikawa has a strange napping disease that distracts her from reality, one that makes the world of her dreams and the real world near indistinguishable. In reality, she is an average high school student preparing for her university entrance exams; but in her dreams she is a magical princess of Heartland, a machine-driven future where the use of artificial intelligence is forbidden. Within the seemingly imaginary dreamland, Kokone discovers more about her family's past and the secret that her father, a talented mechanic, has tried to protect her from. However, as the events between two worlds intertwine, she must now protect the secret from villainous entities, both dream-like and terrifyingly real.

Infected Digimon—digital monsters who have begun acting in a berserk manner and experiencing a bizarre increase in power—are invading the real world. While Maki Himekawa and Daigo Nishijima, agents of the mysterious Incorporated Administrative Agency, attempt to learn more about these disruptive appearances, most of the Chosen Children are busy preparing for Tsukishima General High School's summer festival.

Mimi Tachikawa, having recently returned to Japan after living in the United States for years, struggles to find her footing among her classmates and fellow Chosen Children. Meanwhile, by throwing himself into his studies, Jou Kido has been deliberately avoiding all issues related to Digimon, causing his partner Gomamon to run away. Mimi and Jou's individual actions cause friction within the group even as the threat of infected Digimon still looms over them. Will the two resolve their personal conflicts in time to help their friends fight off the latest threat?

[Written by MAL Rewrite]