Shinichiro Asano is a penniless high school student who decides to look for a job in order to pay his rent. His teacher suggests that he find work doing housekeeping. While working for the Shimazu family, he meets Sakuya, a beautiful girl who comes off as a bit crude and selfish. But Sakuya is also the 37th head of the Shimazu family and works as an exorcist, capturing and eliminating unwanted creatures. One day, Shinichiro accidentally frees one of these creatures and they must cooperate to recapture it.
Alternative Titles: Isuka, ISUCA [イスカ], Isuca: Gokuraku