en Cuevana 3. Su-jeong, who has dreamed of having a great relationship and wanted her first experience to be romantic, meets three men over the course of a year. Sang-cheol is obsessed with the idea of sleeping with her. Jeong-su looks considerate and innocent. Seok-tae randomly shows up once in a while and takes care of her. Among these three men, who will she have her thrilling first experience with?