Tokidoki, a Japanese high‑school student, is sent to a high‑tech history museum after failing his history class. The museum uses virtual reality to recreate the Edo period, where Tokidoki must complete make‑up work for the failed lesson. What begins as a simple school project quickly turns dangerous when he is attacked by two supernatural beings called the nue and the yakou, causing him to lose vision in his left eye. A girl named Kuchiha saves him from the nue, but Tokidoki then realizes he is no longer wearing the simulation goggles and is trapped inside the virtual Edo.