The series "Doona!" is a Korean romantic comedy about the relationship between an ordinary student and a girl idol. Freshman Lee Won-jun rents a small apartment in a modest neighborhood and has no idea that his downstairs neighbor is a former celebrity. Lee Doona used to sing in one of Korea's most popular youth groups until she suddenly announced her departure at the peak of her career. Wanting to find out what prompted the star to take such a desperate step, Won-jun starts to subtly get closer to her.