“So the best way to become the owner of that house is… to marry rich!” After the deed to Jojo’s late grandfather’s mansion is deemed invalid, a demon appears, declaring her the mansion’s true owner and him its guardian spirit! He even has a plan for her: marry one of the current occupants! But Jojo’s never been in a relationship and needs all the help she can get. Will she get the key to the mansion and the heart of a future husband? Or will she discover there’s more hidden between these walls?