After spending their first year of high school in peace and quiet, Haruka and Makoto run into Nagisa, a new student who was a member at a swimming club with them when they were kids.  That swimming club is being torn down, so the three of them sneak in to dig up a time capsule that they buried in the back, which is when they are reunited with Rin, the fourth member of their group who left to study abroad.
A little skinny dip, then.
Dann eben nackig.
Me quedo desnudo y ya.
Pues desnudo mismo.
Ce sera un bain de minuit alors.
Nudo andrà bene.
Vou pelado mesmo.
Ну тогда голышом.