Tasogare Otome x Amnesia

Synopsis

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 out to be fact when Akahito is spotted during the festival. A student named Yuko 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 Yuko. Kirishima makes a claim to her superstitious friends that the only way to stop Akahito from killing them is to sacrifice Yuko the ghost, but paranoid and hysteric, they intend to sacrifice Kirishima, believing she and Yuko are the same person. The club stops the superstitious students by having Yuko disguise herself as Akahito where she chases the students out for offering the wrong sacrifice. With her ordeal over, Kirishima leaves, but not before apologizing to Yuko. Meanwhile, Kirie and Momoe leave the bell tower after helping scare the superstitious students, until Kirie encounters the shadow ghost.

(Source: Wikipedia)