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 has intentionally used your toothbrush.
Jemand hat absichtlich
eure Zahnbürste benutzt.
Alguien usa su cepillo 
de dientes a propósito.
Alguien usando vuestro cepillo 
de dientes a propósito.
Quelqu’un se sert délibérément
de votre brosse à dents
Qualcuno ha usato intenzionalmente 
il vostro spazzolino da denti.
Alguém usou sua escova
 de dentes de propósito.