[5] "Beautiful Liar" is a rhythmical and powerful punk rock-style song that sings the reason for love found in the most extreme and dangerous relationship, with a highly addictive beat and high-quality vocals and performance, providing a more intense sense of immersion.
[10][11] Tapping into the dangerous nature of love, the music video features the members performing in arena set ablaze, clad in leather ensembles, which capture the track's sonic potency in sleek choreographed moves and rebellious expressions.
[7] The music video shows the members of Monsta X take the stage in front of a crowd full of mysterious people dressed in all black, features imagery of chains and a horse in a red tent.
Jang also added that "the sharp electric guitar and heavy drums, which seem to have been inspired by Kanye West's "Black Skinhead", have produced the existing wild beauty, but they did not miss the sense of creating the "killing part" which they learned from All About Luv and The Dreaming".
Jang emphasized "I.M and Jooheon's raps, which alternately use power, draw tension over and over again, and Hyungwon's hook injects sweetness in the right place, that despite its light composition, the song still penetrates the ears excellently and announces its presence".
[19] Taylor Glasby, writing for Dazed, said that as a curveball, it "dissects and reassembles its structure with steely precision", giving "heady and hypnotic, a teasing, persistent spiral of sound", which makes it a "slithery banger".