Reidsbay

Hometown Cha-Cha-Cha OST has great summer vibes too. "Romantic Sunday" (Car the Garden), "Be the Light" (Kim Jae Hwan), and "I Hope You're Happy" (Lee Sang Yi).

I also like "With" by the cast of Twenty-Five Twenty-One and the theme song by Kim Sejeong.

Weightlifting Fairy - "You and I" by Kim Jong Wan.
Vincenzo - "I'm Always By Your Side" by John Park.