Searching for a Claire Bible manuscript, Lina and the others find an ancient book describing a musical spell. The spell requires participants to dress up in costumes and chant together. Lina thinks the song being is a holy spell of magical protection but it turns out to be a lost festival song to summon holy light and flower petals. When she discovered this discrepancy, she blows up everyone with a hastily cast Dragon Slave.

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?!