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...
Someone used his toothbrush on purpose.
Jemand hat seine Zahnbürste
absichtlich benutzt.
Alguien usó su cepillo a propósito.
Alguien usó su cepillo a propósito.
Si quelqu’un a délibérément
utilisé sa brosse à dents,
Qualcuno ha usato 
il suo spazzolino di proposito.
Alguém usou a escova 
de dentes dele de propósito.