EPEX is making a comeback with the 4th mini album 'Book of Love Chapter 1. Puppy Love'.
This album is the second chapter of the debut album 'Bipolar Pt. 2 As the first album to fully unravel the story of 'Book of Love'
It details the process of boys falling in love for the first time.
Regardless of the era or region, the message is that the nature of the boys' first love does not change, but there are differences in the way of expression.
It is expressed through lyrics, costumes, and videos.