He couldn't see the light, but he could hear every note missed by Su Nian'an's fingertips. When she broke "Moonlight", he quietly completed it with his whistle. Until that day, she choked and said "I like you", but turned around and ran towards the corridor of the hospital. He never said the response, leaving only a recording of the whistle. Later, she realized that some confessions did not need eyes to witness...