Synopsis
Puberty marks the period when many first develop an interest in the opposite sex, but Kasuga is affected more intensely than most. Her mind becomes so consumed with thoughts of penises and testicles that her academic performance suffers. So when her childhood friend Kobayashi wagers that he will score higher on the upcoming exam, with the victor entitled to demand anything from the loser, she recognizes her chance to see male genitalia in person.
