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.
There's an old saying my 
late grandma taught me.
Meine verstorbene Großmutter hat mir eine alte Redensart beigebracht.
Había un dicho que me 
decía mi difunta abuela.
Hay un dicho que siempre 
me decía mi difunta abuela:
La mia defunta nonna 
 mi insegnò un vecchio detto.
Tem uma frase que minha 
avó me ensinou.
Моя покойная бабушка научила
меня старой поговорке.