SUNMI is a soloist who's held her own with each song release since 2013. With a vampire concept, "FULL MOON" compares love to the moon. CHUNG HA is a soloist, loved for her girl crush charms since 2017. "Why Don't You Know" has a guitar riff and tropical sound that fits well with CHUNG HA's polished voice to highlight her charms. Samuel is an artist who's shown his growth since his 2017 solo debut. "With U" carries a special melodic exchange between Samuel and CHUNG HA, who was also a part of an audition program. KIM DONG HAN debuted as a successful soloist in June of 2018. Featuring PENTAGON's Woo Seok, "Ain't No Time" is a song with tropical EDM sounds that easily capture the ears.