Natsume and Meow-sensei participate in the Hasuohoe, an auction for those interested in yokai exorcism.
There, he encounters a theft incident, and Tanuma also loses the exhibit that was entrusted to him by an acquaintance.
Meanwhile, Natsume, who has discovered who the person in the portrait decorating the hall is, appears before him...?! Volume 31 of the Yokai Contract Story!!