Nodame Cantabile (2005)

Chiaki, an arrogant piano star at a top music academy, gets demoted to the reject class and finds himself living next door to Nodame, a brilliant, chaotic pianist who has decided she is his girlfriend. The romance moves slowly and the comedy is broad, but music is the real love language here: two very different musicians pushing each other to grow is the payoff, and it is earned. Del Rey's print edition stopped at 16 volumes, but Kodansha later released all 25 volumes in English digitally, so the whole story is there to read.