Yufuin's inspiration leads the Defense Club decides to go on a training camp to the ocean on . Meanwhile, the three student council members head to a beach resort in a limousine. The beach has bright sun and white sand, but there's something a little off about it. A strange feeling starts hovering around the group's members...
The toothbrush incident, this development...
Der Zahnbürsten-Fall, diese Situation.
El incidente del cepillo 
de dientes y ahora esto.
El incidente del cepillo 
de dientes y ahora esto.
Depuis cet incident,
L'incidente dello spazzolino, come sono 
andate le cose: sembra tutto così strano.
Do incidente da escova de dentes, essas coisas.