He is working in a fully industrialized music world. NO passion, just assembly line. Then he sees the passion of creation in those two. Something he didn't see who knows how long.
They sure grow up together. IT was a fun series. Ending is not like an ending. I hope She returns to the story once again. Maybe a small one shot would do.
She started dating her as research for a yuri manga at the start. There were times they got close, but it felt like nothing will happen between those two.