Harumi is a newbie office worker living in an apartment with a supernatural roommate named Kurogane. They spend mellow and blissful days together as Kurogane levels up his household skills...until he suddenly appears outside the apartment as a "human" one day?! Things get even worse as they may have to say goodbye to their smooth sailing days as the danger of a contract termination approaches...?! A fun and whacky romance awaits!
