After a guard at an exhibit of Egyptian artificats dies horribly, Ayaka, Suimen, and Mamoru are hired to investigate. Meeting with Natsuki Ogawa, the woman in charge of the exhibit, they find that a spirit has been present in the exhibit, but they conceal that from Minase. Investigation of the president only finds that he's committing sexual harassment of his employees. She also discovers that Kouzou has been assigned the case as well. Waiting until nightfall, Ayaka discovers the animated corpse of an archeologist attacking people working on the exhibit after dark and fights the ghoul. After solving the case, while waiting for Naname to make cake for the employees, they discover that Ogawa's boyfriend was died in the course of finding the ruins, and that he's the ghoul.
Meanwhile, the President of the company threatens to close down the exhibit if Ogawa doesn't sleep with him, angering the ghoul. Rokkon and Ayaka confront the ghoul again, and this time get him to explain his story (while Ayaka gets drunk). Ayaka agrees to protect Ogawa. Unfortunately, Ayaka is caught off guard when Ogawa consents (reluctantly) to her employer's desires, and the Ghoul sets off to seek revenge, with Ayaka in pursuit. Ayaka saves the President of the Company, and Ogawa, and ultimately the exhibit is opened without Ogawa having to sleep with her boss. Unfortuantely, the President of the company is fired for embezzlement, and Ayaka doesn't get paid.