He's Playing Our Song (S01E07)

Tamami feels trapped in both her job and her life. One day, a nostalgic song from her teenage years triggers memories from 15 years ago. Back in high school, the introverted Tamami befriends Rin, a talented pianist, and their bond grows through their mutual passion for music. However, as time passes, they slowly lose touch. Now in her thirties, Tamami stumbles upon a social media post featuring Rin, revealing that she has pursued a career in music.