Su Wanxing is the most inconspicuous person in the music school. Her only courage is given to the old piano on the rooftop and her crush Lu Shiyan, who has been secretly in love for many years. She used the pen name "Xingluo" to publish unknown melodies online, but she didn't expect that those notes that healed her would quietly redeem Lu Shiyan, who was stuck in a creative bottleneck.
By accident, Lu Shiyan followed the sound of the piano to the rooftop and discovered Su Wanxing's secret. The cool top star suddenly landed on campus and pressed her step by step: "'Xingluo', your melody can only be sung to me." The fearful coward vs the cold star, from anonymous appreciation to two-way love, they healed each other's past in music and protected their common love amidst rumors. When the whole world doubted that she was not worthy of him, Lu Shiyan stood on the stage where everyone was watching and raised the microphone: "Every song I sing is a confession to Su Wanxing." It turns out that the best love is the purity where you understand my melody and I protect you.