My sister's dream has always been to become a schoolteacher, and now she's starting her teaching practicum—assigned to my very own class. I truly hope she can fulfill her dream. However, my class is full of delinquents and the classroom is completely out of control. As her younger brother, I'm deeply worried. All the cute girls in class have already had their virginities taken by these thugs. The thought of those delinquents laying a hand on my sister keeps me up at night. I'm terrified about whether she'll make it through this internship unharmed.