Koume, a cool-headed office worker suffering from insomnia, is constantly harassed by men and has completely lost interest in romance. Her life takes a turn when Zeta, a handsome, arrogant man who is exactly her type, appears. He claims to be an incubus sent to take her virginity. However, Zeta seems surprisingly inexperienced when it comes to seducing women. How will this romantic comedy between the innocent, bumbling incubus and the love-averse office lady unfold?