A comic of boys challenging various embarrassing body measurements such as measuring the length of the penises, erection in public and semen sampling...
When a boy goes to a fishing store to use the restroom, he is unable to hold it in and wets himself. Later, he talks with the shop owner and his taught many things...
Ikuta's teacher is concerned that he's been masturbating too much, and that it's affecting his grades... but what will happen when he encounters Kobayashi in the bathroom?
At this age, it seems everyone knows about it. Did they learn it? How exactly did everyone find out about it? A story of a boy's first time masturbating.