Kotobuki Osoruji, a serious special effects otaku and director of the Special Effects Research Laboratory, visits the room to organize his late uncle's collection, and finds himself wearing the costume of the main hero of the tragic special effects program "The Dead Body Necroman" that was once broadcast. discovered. What's more, the costume is possessed by a man's spirit, and he says that he wants to become an ally of justice, which he was unable to do during his lifetime. Inspired by the spirit of special effects, Kagura and Kagura, a member of the club, plan to make Necroman play an active role in reality as a "dead man of justice".

In the beginning, the words started by dealing with the incidents that occurred in the school, but they gradually encountered incidents that exceeded common sense. At that time, crimes committed by people with supernatural powers called "Knockers" became a problem in the world. Words declared a battle with Necroman against them, who are perfect for villains who change into strange shapes and do evil things.