1. "Luv Letter" is a pure piano music composed by Dj Okawari from Japan.
2. "Mark of Rain" is written by YIRUMA, the musician who is best at depicting love in Korea. On a starry night, it suddenly rained. This inspired YIRUMA to write the piano song "Kiss The Rain".
3. "Dream Wedding" is from Richard Clayderman's piano music. It sounds sad, and the piano plays a sad melody, which comes from the episode of the cartoon "Rurouni Kenshin". Some netizens wrote lyrics and made a rap song based on this pure music. Unfortunately, I never remembered the title of the song.
4. "River Flows In You" is another beautiful song by Korean pianist Yiruma. The sad rap song "That Sad Memories" was rearranged based on this song.
5. "City in the Sky Singing Version" A girl is singing, and the desolate flute sound in the middle of the song makes people's hearts break. There is also a rap song "Oblivion" based on this song.