Once (2007)

The premise is basic: the guy (Glen Hansard) tries to earn a living by playing his guitar and performing in the streets of Dublin; one night, the girl (Markéta Irglová) hears him sing and is instantly enchanted by his music; after finding out that he also repairs vacuum cleaners, she negotiates to make him fix her vacuum. They eat lunch together the next day; the girl catches the guy’s attention after she reveals that she too is a musician - she plays the piano. With the guy wanting to hear her play, the two visit a music store where she is allowed by the owner to use the instruments. The guy teaches the girl an original piece, which she is able to learn very quickly; the two then play and sing together, solidifying their connection with one another.