Devils that lurk within humans, and family that is deemed irreplaceable to humans. With these two words, a new story in which familiar characters clash with passion. After a long battle, the Igarashi Family and their friends have finally achieved peace. However... a new threat that transcends Giff, the progenitor of the demons, has appeared.

Tsuyoshi Honjo and Naoto Soda are employees of an unremarkable production company, SLOPPY DOGS are huge fans of the popular tokusatsu series, "Shinsei Denshou Forticus" that's streaming on TTFC. Instead of working, they watch Forticus and get scolded by their colleague, Koharu Umishiro. One day, after being pressured by their boss to go on an interview, the three of them got caught up in a crazy incident! And then the "real" Forticus appears?!

This film is a love story centered around the clumsy yet earnest first love of shy high school boy Nozumu and Kei, a popular girl in his class. It is intertwined with the suspicious death of a classmate, a suicide attempt, and frightening suspicions about a lover.