Mari is a female university student. She takes part in an experiment held by popular VTuber Sophia. When Mari arrives at the place where the experiment is to be held, she notices the place looks like a prison. 12 people participate in the experiment and they are assigned roles of prisoners and prison officers. The experiment takes place over 7 days. Mari is assigned the role of a prison officer. The experiment turns violent.
Toru Nakanishi is in his third year at a university. He lies to his ex-girlfriend Mami Higashiyama that he is trying to get a job at a top advertising agency.
Taking place after the end of the series, Doubutsu Sentai Zyuohger Returns will focus on Zyumans and humans peacefully co-exist on Earth. It is then decided that they'll have a battle to determine who will rule the Earth, but a real danger lurks in the shadows.
Step right up, everybody, the Space Circus Troupe is in town! Their ringleader, Domidoll, wants to turn all Zyumen evil and have them join his circus. However, the Zyuohgers won’t let him! Can the Zyuohgers protect everyone?
The Ninningers come across a new enemy, Dark Doctor Mavro, a remnant of the Shadow Line, who created his own, evil version of Aka Ninger serving under him by stealing the real Aka Ninger's Nintality, and because of it, Takaharu's life is now in danger. All hope seems lost until the Ninningers meet the ToQgers, who fought and defeated the Shadow Line in the past, and it's up to them to join forces in order to overcome this new crisis.