Sudden Downpour (S01E03)

Shuri finds herself in trouble when she's discovered listening to music in class, leading to her cellphone being taken away. The tune playing in her earphones turns out to be "Shungyou," an improvisation by Setsu's grandfather, Matsugoro. Curious about the connection, Setsu inquires how she knows the piece. Shuri reveals that the song is special to her, as it carries cherished memories tied to her grandmother.