Gakkou no Kaidan: Kubinashi Rider!! Shi no Noroi

A headless rider terrorizes the town on the anniversary of what was his death, seeking to decapitate people like himself. When the ghost turns his headlights upon Satsuki, the gang needs to find a way to put him to sleep again, and quick!

(Source: Crunchyroll)

Note: This episode takes place before the final episode of the TV series, "Farewell, Amanojaku — The Descent of Ohma."