The Sket-dan is getting filmed for an in-depth story by the AV Club, and their task is to unravel the mystery of the Glass Man, a case of serial window breakings around school. As the Sket-dan narrows down the suspects, the culprit becomes clear, but could this case be a little bit too easy?
Got it? Change those hearts of yours 
and turn over a new leaf! Just do it!
¿Qué me dicen? ¡Ha llegado el momento de cambiar de 
hojas para reemplazarlas por unas nuevas! ¡Just do it!
¿Lo entendéis? ¡Ha llegado el momento
de que maduréis un poco! ¡Just do it!
Entenderam? Mudem essa atitude
 de vocês e renasçam! Just do it!