[3] Yesung experimented with various genres in Sensory Flows and its repackage, ranging from Indie pop, R&B, and Jazz-pop[1][2] The lyrics of "Small Things" talk about simple emotions and stories that make everyday life worthwhile.

[8] Speaking on an interview Kim Shin-young, Yesung revealed the titular track felt stylistically suited for him and adding that the song feels sophisticated.

[10] "Beautiful" is a song penned by Yesung and Min Yeon-jae, taking an inspiration from the former's dislike of noisy place when travelling.

[10] "4 Seasons" is another jazz song featured in the album, with its lyrics encouraging the listeners to reminisce about good times with their loved ones and look forward to the next meeting.

[10] "Moment" is a soul ballad with vintage melodies and warm acoustic complemented with lyrics of unchanged feelings to another despite not meeting for a long time.

[10] The penultimate track is "Mermaid", another ballad of the album is a melancholic song with its lyrics narrating the desire to be with someone only for them to realize they are stuck in fantasy.