"Welcome~ To Blue Moon, a cocktail bar!" After leaving her job at a successful company, Nayeon is now working part-time at her cousin's business, "Blue Moon." She's having a great time making various cocktails, but she's still contemplating what she really wants to do. One day, a mysterious customer, Inwoo, appears in front of Nayeon. "...Thank you for your concern." Unlike Nayeon, Inwoo seems to be pursuing his dreams. But he seems to have his own troubles that he can't talk about... A story of youth wandering between reality and dreams! The drama between Nayeon and Inwoo begins with cocktails!