Strict teachers, all those hours inside four walls, all your desires and youthful energy repressed; School is an endless drag - untilshe comes along. Ji Young has a perfect body and tons of sex appeal, and she knows it. Needless to say, all the students go crazy, and the male teachers too! They should be preparing for the annual school festival, but they're all occupied with other matters. Then a scandal erupts. The three major suspects are the school's trio of professional playboys and a particularly strict teacher is after them. His mission: find out Who Slept With Her?