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...
Actually, you can't ride a train 
without a shirt on, can you?
Darf man überhaupt ohne Oberteil Zug fahren?
De hecho, no puede subir 
al tren sin camisa, ¿no?
De hecho, no podrá subir 
al tren sin camiseta, ¿no?
Sauf qu’il est interdit de monter
dans le train torse nu.
Tra l'altro, non si può salire su un treno 
senza la maglietta, vero?
Na verdade, não pode 
pegar o trem sem camisa, pode?