Sex Studies

Puberty often awakens a newfound curiosity about the opposite sex, but for Kasuga, this natural phase of adolescence takes an extreme and distracting turn. Rather than experiencing a passing interest, she finds herself entirely consumed by persistent thoughts of male anatomy. This intense fixation quickly begins to interfere with her daily life, causing her academic performance to suffer significantly as she struggles to concentrate on her studies. Recognizing her declining grades, Kasuga’s childhood friend Kobayashi proposes a wager to motivate her. He challenges her to see who can achieve the higher score on their upcoming examination, establishing that the winner will be granted a single request from the loser—no matter what it may be. While Kobayashi likely intends the bet as a friendly incentive to help her refocus, Kasuga views the arrangement through a very different lens. For her, the stakes represent far more than academic pride. She immediately recognizes the challenge as the perfect opportunity; should she win, she plans to use her reward to finally satisfy her overwhelming curiosity by seeing male genitalia firsthand.