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...
If you've brushed your teeth,
Wenn ihr euch die Zähne geputzt habt,
Si se cepillaron los dientes,
Si os cepillasteis los dientes,
Si vous vous êtes
brossé les dents,
Se vi siete lavati i denti,
Se você escovou os dentes,