Toujima Tanzaburou has spent his entire life chasing a dream: to become Kamen Rider. Now, at 40, reality has nearly caught up with him, and he's on the verge of letting go of his childhood fantasy. That is, until he gets caught up in a crime wave led by the "Fake Shocker" gang—turning his long-time dream into something far more dangerous. What starts as a pretend hero's journey quickly becomes something real. The ultimate Kamen Rider fantasy is about to begin!

Let's walk and talk. Can you get up? The Gnosia lie. Pretending to be human, they'll get in close, trick and deceive, and then eradicate each person in the vicinity from the universe, one victim at a time. The crew of a drifting spaceship, facing off against a mysterious and deadly threat known as the "Gnosia" and having no idea who among them is really the enemy, formulate a desperate plan for survival. The most suspicious among them will be put into "cold sleep" one by one, in an effort to completely rid the ship of Gnosia. However, it is almost impossible to tell whether each person put into cold sleep was really Gnosia—or simply a poor, unfortunate scapegoat, sacrificed by the Gnosia for their own survival. Can the humans emerge victorious? Or is mankind doomed...?

By the mid-21st century, Tokyo's criminal underworld is ruled by Demon Lords—crime bosses who have undergone ether enhancement surgery, granting them terrifying superpowers. The only ones who can take them down are Heroes, bounty hunters who boost their own ether powers using the drug E3 (E-Three). With legalized killing as part of the job, being a Hero is less about justice and more about survival. Yashiro, known as the Reaper, is one such Hero—an independent enforcer who works alone. That is, until Jougamine, a high school girl and self-proclaimed "apprentice," forces her way into his life. Reluctantly taking her under his wing, Yashiro soon finds himself caught in a whirlwind of deadly conflicts.

Fate/strange Fake centers around an imperfect copy of a Grail War based on the Third Holy Grail War in Fuyuki. Following the conclusion of the third Grail War, a US-based organization with magi distinct from the London-based Mage Association, used data from Fuyuki's Grail War to plan their own ritual. Seventy years later, they used the city of Snowfield as the Sacred Land for their own Grail War. However, they were unable to successfully replicate every aspect of the ritual, resulting in it acting only as an imitation that has lost the Saber class and allowed for the summoning of strange Servants due to the blurring of the definition of a "hero." Rohngall and his pupil, Faldeus, have been dispatched by the Mage's Association to investigate the city and the state of the war. Faldeus, a US organization spy, has Rohngall sniped upon his arrival, despite knowing that Rohngall is a puppet. He declares that their Holy Grail War has been in development and is real, causing a commotion at the Clock Tower, and that he wishes to "advertise" the project to the Association.