- "Love Letter" is a sad yet beautiful ballad.
- "G.R.8.U." has a fun and lively tone.
- "Eternity" marked a subtle shift in VIXX's concept, from horror to a more sci-fi approach.
- "Love, La La La" has a catchy and relaxing feel.
- "Error" has a bombastic, emotive beat with a melancholic tone.
- "After Dark" has an aggressive, beat-heavy brew of electronic tone.
- "Time Machine" has a beat-heavy sound and unique 80's melody.
- "Love Equation" gives the Lighter and Softer feels with a lighthearted tune.
- "Chained Up" gives the Darker and Edgier theme with a powerful beat.
- "Depend On Me" has a near-perfect brew of orchestral elements, heavy beats and sky high vocals.
- "Dynamite" packs more punch in its tight, endlessly 80's inventive structure.
- "Six Feet Under" has a stuttering, sledgehammer production.
- "Badbye" is a sad song with a beautiful melody.
- "Milky Way" gives the Lighter and Softer tone with some upbeat melody.