Troublemakers Mok-won, Ryu and Hak-moon are far from passing the state examinations. Three female students enter the school during a new spring term and the atmosphere changes. Then one day, Mok-won and Ryu are taken to around the back of the school and molested by an unknown woman. The three of them start an investigation.

During the late period of the Joseon, Jae-won, Man-ki, Deok-ho and foolish Chil-deuk are the only ones at the village school. The school is going through a rough patch so the school teacher visits his girlfriend the gisaeng and suggests to his students that they bring in female students. So-hyang and the other girls brighten up the mood of the school and more male students sign up. Yeon-hwa is jealous of Jae-won and So-hyang who fell in love with each other at first sight. She confesses her love to him but he doesn't give her any attention so she tells him So-hyang's secret. On the other hand, the teacher's wife is surprised to see a man wearing a mask peeking at her body but is surprised to the see the size of the hole in the pumpkin he dropped. Not happy with her husband's night skills, she calls in the male students one by one to find out but the pumpkin belongs to no one... To whom does the hole belong to?