A campus rumor claims girls vanish, return sickly, and with noticeably smaller breasts, sparking concern among students in the school everywhere today.
While watching the others perform their duties to improve his own performance, Issei and Asia accompany Rias to determine whether a coffin bears a curse. During the probe, Issei becomes possessed by an Egyptian sorcerer called Unas, and it turns out that Unas shares Issei's lewd inclinations. The spirit will abandon Issei only if they succeed in lifting the curse that a demon imposed upon Unas after he attempted to make him his bride in the night.
