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.
Beats me. Maybe she 
wanted to go into music?
Keine Ahnung. 
Vielleicht etwas mit Musik?
No sé. ¿La música tal vez?
Ni idea, macho. ¿Sería la música?
Peut-être percer dans la musique ?
Chi lo sa. Magari nel mondo della musica?
Não faço ideia. 
Talvez ela queria ser cantora?
Не знаю. Может, с музыкой связано?