[OPENING] Yang Da-il (Darling) - The sentimental R&B singer's sweet love song is about wanting to spend the rest of my life with a loved one. [MY IDOL DIARIES] DKB (Work Hard) - The hip hop, R&B genre song is about working hard for an amazing future with a loved one. [CLOSING] Stray Kids (Ex) - The song is about letting a loved one go due to feelings that have faded, but regretting their decision and blaming themselves.