Ueda, the most brilliant student since the school was founded, had an unusual affection for his homeroom teacher, Mami. "I really want to be alone with you..." However, the chance never comes around. Frustrated, Ueda takes the drastic measure of submitting his exam papers blank. His wish comes true, and Mami calls him in, and they are alone in the classroom after school. It's now or never. Ueda forcefully captures Mami's lips. At that moment, the sound of a slap echoes through the classroom.