It's hard to find the intersection between the psychology and music of K-pop idols. But there is an exception named: BTS.
Imagine yourself as a house. The facade of the house, the things that are displayed for others to see can be understood as Persona - The mask. Entering the ground floor area of the house, we can see this as Ego - Self. One's ego cannot be seen from the outside. Other people can only know those secrets when they contact and enter the 'house'. In the basement of the house is Shadow. Outsiders just passing by the house certainly couldn't know what was in the basement. The ego also sometimes feels the presence of the Shadow, but the feeling about it is really vague and elusive. We too, can't always control everything, especially the Shadow.
Those extremely complex psychological definitions have been incorporated into BTS' Map of the Soul album series. Specifically, Intro: Persona, Interlude: Shadow and Outro: Ego.
BTS music, easy to understand is also very easy to understand, anyone who has just heard it once can see the message they want to convey. Saying "difficult" is also extremely "difficult". The music they want to convey is not just a one-time listen. Suga once said, "The music we listen to during adolescence affects us a lot.". Therefore, he and the group always want to bring the most positive energy to the listeners.
It's no coincidence that BTS has received such great reception around the world. Their music has touched the hearts of millions of listeners.
Book title: Map of the Soul: 7 – Persona, Shadow & Ego in the world of BTS.