Otogi Shinobu works at a real estate firm and he's actually half-human, half-incubus. He doesn't have a set partner and has been enjoying one night stands from which he collects life essence.

One day, Hyouma, the son from a large corporation, the Ootori group, came in looking for a room to rent. Shinobu swiftly brought the young man for a private viewing in hopes of clinching a contract for a high-class property.

However, Hyouma becomes affected by Shinobu's aphrodisiac scent, which actually should only be released when Shinobu's in a rut. This causes Hyouma to release a thick aroma of life essence that Shinobu has never encountered before and the delicious smell accidentally entices Shinobu into kissing Hyouma and..