Aliens have been emigrating to Earth secretly, but only a handful knows about this truth. Living in such a society, the main character Hiroyuki Kudo begins working at a private security organization E.G.I.S. (Enterprise of Guard and Investigation Services). The organization takes care of cases related with aliens, and Hiroyuki works day and night to protect peace. However, there lies a huge secret in him, which he himself is not aware of. He carries Ultraman Taiga’s “particle of light”. The new story begins as Taiga’s powers revive from Hiroyuki’s body!

The time of the New Generation Heroes is drawing to a close. Hiroyuki is being targeted by a dark power, forcing the other Ultra Heroes, from Ginga to R/B to appear and help the Tri-Squad battle these evil forces. But among them is Taiga's father? What has happened to Ultraman Taro?!

Facing goodbyes and graduation, Naomi Nakashima, her childhood friend Satoshi Mochida, and their classmates, are clearing up after their last ever cultural festival, when horror buff class representative Ayumi Shinozaki decides to perform Sachiko Ever After so they will stay friends forever. Instead, they were whisked away to a haunted graduation ceremony for Heavenly Host Elementary School, forced to close after a series of gruesome murders. What fate awaits Naomi and her friends at the cursed school...?

The true story of Isha Sensei, the only doctor in her hometown Oisawa Village (now Oisawa, Nishikawa Town) in Yamagata Prefecture, a remote area at the time, where there was no doctor.