Musically, the pop-rock infused dance track features a variety of vocal samplings, acoustic melodies, and hazy synths, while the lyrical content explores the subtle insecurities that come along with teenage love.

Following the release of "Let's Not Fall in Love", it was met with positive reviews from music critics, many of whom highlighted the track's unique and sentimental composition, and further praised the band's versatility with emotional and complex themes that are seldom seen in K-pop.

Written and composed by member G-Dragon and Teddy Park, "Let's Not Fall in Love" is a pop-rock tune with a classic sentimental dance sound, that was compared to the group's early single "Blue".

Billboard said that "Let's Not Fall in Love" "showcases the boy band at their most sentimental", and has a classic BigBang song feel but with a unique sound because of the "lack of a definitive chorus and T.O.P and G-Dragon showing off new vocal colors instead of their usual personality-driven raps.

[17] Acting as a complement of the lyrics, the music video highlights the happiness of falling in love through the use of bright colours, and fun and innocent depictions of dates, which is contradicted by the close up shots that emphasise the member's worried faces.

[1] Ha Yeon-soo, Lauren Tse, Kim Yoon-hye, Seo Yea-ji, and Lee Ho-jung played the girlfriends of T.O.P, Taeyang, Daesung, G-Dragon, and Seungri, respectively.