As a result of a magic circle that Aqua had drawn in Keele's dungeon, strange explosive doll monsters have started to appear, putting the town at risk. Investigating the dungeon once more, Kazuma and Darkness discover the archmagician behind the dolls to be one the Devil King's commanders, Vanir, who has the ability to read minds. Although he appears to be defeated following a lucky attack, Vanir attaches his mask onto Darkness and possesses her body, only to be completely put off by her masochism...