Puberty Study Session

Kasuga, a young girl, becomes increasingly fascinated with the idea of male genitalia as she enters puberty. Her obsession with this topic starts to affect her grades, prompting her childhood friend Kobayashi to challenge her to a bet. If Kasuga wins, Kobayashi will let her see male genitalia in the real world. This bet is the catalyst for Kasuga's desire to observe and learn more about the male anatomy. As she navigates her new interest, Kasuga's grades continue to suffer, leading to a decline in her academic performance.