ZZING

All Sul-Bi has ever wanted is a princess who will love her. This desire of hers ostracizes her from the people around her—all alone, without a friend in the world, Sul-Bi has a chance encounter with a 'princess'. Except there's something off about this princess...

Seong Seowol, the eldest daughter of the Seong family, is obsessed with erotic art books and harbors intense fantasies about romantic intimacy. Having delayed marriage past her prime due to her father's fierce opposition, she suddenly finds herself wedded to Gyeongho, a young master rumored to be fierce and menacing in town. Contrary to Seowol's hopeful expectations, Gyeongho puts up an iron wall, and their first night together fails to happen... "There's no way my husband is impotent..!" Suspicious of her husband's lack of worldly knowledge, Seowol resolves to take matters into her own hands and tutor Gyeongho herself. On the night of the full moon every 15th of the month, a seductive and steamy intimacy class begins between the two.

Nuri drops out of school and works part-time to earn a living. The son of the president's family, whom she was taking care of, is hospitalized for a long time due to a motorcycle accident. The president's wife, concerned about the president's anger, proposes to Nuri, who looks exactly like her son, to dress up as a man and go to school as his replacement. "No... Ma'am, I'm a girl...?