Tokidoki wakes up in the Edo period thinking he's still in a simulation, except the nue that took his eye is very real, and neither of you knows why yet. The mythology unfolds like a locked box being picked at from the inside, demons, kami, humans all stacked in layers he has to understand to survive, not just to pass a test. It gets weird in the middle and never quite finishes what it started, but those opening episodes hook you hard enough that you'll forgive it.
Tokidoki thought he was signing up for boring virtual reality makeup work when his high school assigned him to a historical simulation of Edo-period Japan. The immersive museum experience seems straightforward enough until supernatural creatures called nue and yakou emerge from the digital landscape to attack him. A mysterious girl named Kuchiha saves him from certain death, but when Tokidoki removes what he assumes are his VR goggles, he realizes the nightmare is real. His simulation exit no longer works, and the historical setting around him is solid, tangible, and dangerous. Stranded in a fully realized world of samurai, spirits, and supernatural forces, Tokidoki must navigate the gap between what he knows from history class and what actually exists in this strange Edo. With his left eye scarred from the initial attack and Kuchiha as his uncertain guide, he begins uncovering the truth behind the creatures hunting him and why the museum's creation contained something far more sinister than educational recreation.