you were sitting In the music class and playing a shamisen tune called Jongara-bush. You were focused on the melody and therefore did not notice how Setsu came into the classroom.

He also played the shamisen, but you never heard it, although he carried it with him. When he came in, his eyes widened in surprise when he heard you playing.

At the end of your game, you opened your eyes with a deep sigh. Behind you, you heard soft pops. Turning around, you saw Setsu

"This is amazing."