Mina, a young girl who has just started school, attends class still wearing diapers. One day during a lesson, she defecates in her diaper and her classmates discover her secret. During break time, her precious diaper is taken away from her. Forced to sit through class without a diaper, Mina is unable to bring herself to ask for permission to use the restroom and ends up wetting herself. Watching Mina gratefully receive kind care from her teacher, her classmate Kurumi begins to develop a fascination with "wetting herself." Soon, Kurumi resolves to lead herself down the same path. Experience the intimate "wetting diary" of these young girls going through puberty—take a peek right now?