オンユ(SHINee)、ウォンピル(DAY6)、ベクホ(NU’EST)、ヨンジェ(GOT7)、Kei(Lovelys)など、豪華キャストが出演するミュージカル『タイヨウのうた』のオフィシャルサウンドトラック！＜収録内容＞1. have a good day 2. Will such a day ever come? 3. The Sun is in my eyes 4. Will such a day ever come (Reprise) 5. The BoyThe Girl (Part 1) 6. That BoyThe Girl (Part 2) 7. Stranger in the dark 8. Milky Way Galaxy 9. A melody called you 10. The sunlight is so pretty 11. Special You 12-a. Your Mystery (Part 1) 12-b. Your Mystery (Part 2) 13. I'll go see you when the sun goes down 14. SurpriseFirst date 15. How did it end up like this 16. Even if this song ends someday 17. Good-bye Days (Part 1) 18. There Norcaf 19. Good-bye Days (Part 2) 20. I'll go see you under the sun BonusTrack 1. Will such a day ever come (STUDIO VER.) BonusTrack 2. Good-Bye Days (STUDIO VER.)