Former (re-do)

Explanation

For all those who are confused about some areas, I've taken it upon myself to use this chapter to do some explaining in the regions that may be confusing for some.

This is advised to read just in case you don't really understand or know what is happening, but at the same time, you don't have to read this if you're okay with the ideas and what's happening.

Firstly, the song I've chosen. Because this song is in Korean, I will be using the English translation for my better understanding as I am not a Korean speaker or reader.
In case, I chose this song because I personally see it fits somewhat well with the story. (Also because I find the song nice to listen to as well, but you know. Haha)
Focusing on verse 1 and the chorus, this is where I get most of my ideas from.

침묵의 수면은 깊이 더
오늘도 깨어난 해일은 thunder
시선에 휩쓸린 모든 삶
아직도 깨지 못한 disorder
내 안의 괴물

Silent sleep is deeper in the cursed maze
The tsunami that woke up today is also a thunder
All the life carried away by the eye
I still can't break the disorder
A monster inside of me

The lyrics 'Silent sleep' I have connected to the fact that everyone is infected with the disease already. It just lays dormant in a 'silent sleep'.
The lyrics 'is deeper in the cursed maze', I connected this to the disease as well. The body is like a maze, there are so many organs and questionable things that happen inside it. This is in correlation to the disease deep in the body, something embedded.

'The tsunami that woke up today' is in a tie with the mass of living dead that only grows. If you've watched the walking dead, you'll be able to recall when they all climb on top of each other to get over the wall. They all looked like a flood/tsunami. 
'Is also a thunder' I've decided to tie this into the aspect that the living dead are attracted to loud noises.

'All the life is carried away' I'm pretty sure this one is self-explanatory towards people and the idea of an apocalypse.
'by the eye' connecting this to the fact they always see things, people dying, people turning, and just horror everywhere, I think it fits well into this area as well.

'I still can't break this disorder' now I know a disorder is quite different to a disease, but I wanted to connect this to the main idea, in that everyone is already infected, it's just dormant. They can't break it or break free from it.

'A monster inside of me' this one also links back to the main idea, they all have the monster living inside of them, and they can't get rid of it no matter how hard they try. 

구해줘 제발, 나를 닮은 가면에서
짙은 고통이 파고들어 심해의 독
Oh 가식 속의 덫 (ooh-ooh-ooh-ooh-ooh, ooh-ooh)
Oh 가짜들의 wall (ooh-ooh-ooh-ooh-ooh, ooh)
Eh 구해줘 제발, 마주하는 어둠에서
옅은 희망도 시들어가 nowhere to go
거짓 속 alone (ooh-ooh-ooh-ooh-ooh, ooh-ooh)
Oh 악몽에서 다시 나를 구원해
I need the light ah

Please save me from the mask that resemblеs me
Deep agony penetratеs into the depths of the poisonous sea
Oh, a pretentious trap (Ooh-ooh-ooh-ooh)
Oh, the wall of the fakes, eh (Ooh-ooh-ooh-ooh)
Please save me from the darkness I face
Even pale hopes shrivels up, nowhere to go
Alone in lies (Ooh-ooh-ooh-ooh)
*Save me from the nightmare again
I need the light, ah*

Looking into to chorus's lyrics, I am able to use them to connect to the story idea as well.

'Please save me from the mask that resembles me' this connects well to the fact that the underlying disease is going to take everyone over at some point. They want protection from it, to be saved from the disease.