Dusk Maiden of Amnesia Season 1 Episode 6

Maiden of Vengeance

As the school festival continues, the Paranormal Investigations club learns about a rumor about Akahito, a masked blood-covered monster that kills anyone who stays late during school as a sacrifice. But the rumor turns in fact when Akahito is spotted during the festival and a student named Yuuko Kirishima claims she was attacked by Akahito which sends the superstitious students hysteric. However, Teiichi discovers Kirishima was behind the Akahito story as she wants to destroy ghosts stories because the students bully her for having the same name as the ghost Yuuko. Kirishima makes a claim to her superstitious friends that the only way to stop Akahito from killing them is to sacrifice Yuuko the ghost, but paranoid and hysteric, they intend to sacrifice Kirishima, believing she and Yuuko are the same person. The club stops the superstitious students by having Yuuko disguise herself as Akahito where she chases the students out for offering the wrong sacrifice.