Adolescent Sex Education

During an exam, Kaede Haruno can't concentrate because something is on her mind. She keeps wondering what a boy's penis actually looks like. "I want to see it no matter what"—this desire keeps growing. Naturally, she leaves her exam paper blank and scores zero. Her disastrous score is seen by Kobayashi, who sits behind her, and Kaede, annoyed at being laughed at, angrily accepts a rematch exam. Though she hesitates when Kobayashi says "the loser has to do one thing the winner says," she accepts because winning would make her wish come true. And so, Kaede begins studying desperately in order to see a penis.