I have FINALLY found a translation to this song, after a year or so. Gah.

"The POV of this song: Two male friends since junior high, one is getting married because of society’s pressure but they are in love with each other."

Infinite Flow - Rainbow (featuring Tablo of Epik High & Kim Jong-Wan of Nell)

I wanted to live a good life
How… did we turn out this way?

This dangerous city called society
Its hasn’t been long since I lifted my feet out
Riding on a bullet train
Called the “elite course”
I was without obstacles on a high road
After walking this road, reasonably
Found a suitable girl of academics
And without thought
After friendship, an engagement, and even getting ready for marriage
Came the worries about my friend

Looking back at days past
It’s already been 14 years
That guy, since middle school
Has been first in class, best at fighting
Always monopolizing
The popularity among female students
Always in that guy’s class, I’ve stayed the same
Either then or today
No matter where I still stay a loner, a coward
You used to always protect me by my side
To that girl you have given my place beside you

The right of resentment
With the feelings that I forfeited and threw away
The feelings I cast out of the world’s view
It is only getting bigger in my heart
A feeling that I can’t turn off
What should I do?

After tonight you are hers
With this drink, let us capture the memories of the past
The one thing I can do for you right now
Is say the one phrase
“Be happy.”
Looking back it was unnecessary
Wanting and begging
It was only a phantom of bubbles from the hot air I spoke
The only real thing in my life is you

My emotions become more passionate with each drink
It is empty, dark inside my head
Just like this, my goal is to completely forget you
But don’t leave my side tonight
Don’t you torment me too
How much more do I have to drink to forget you?
When tomorrow comes the real me will no longer exist
But don’t you ever change

The right of resentment
With the feelings that I forfeited and threw away
The feelings I cast out of the world’s view
It is only getting bigger in my heart
A feeling that I can’t turn off
What should I do?

Go go what should I do?
(Over the rainbow)
Go go where should I go?
(Over the rainbow)
Go go what should I do?
(Over the rainbow)
Go go where should I go?
(Over the rainbow)

Before I know it the midnight gives way to the dawn
Becoming drunk on each other
You and I, as if we had nothing else to do
Lean on each other’s warm chest
How can something called love
Be so sincere? Make me so thirsty?
I am cursed for I have touched a love that can never be
Give me back my heart

Even though this may be the last time
I hold you
And my tears speak my thoughts
I hold your shaking hands
And with a kiss I grab on to the end of tonight

In the next world, let’s be born in a better world
I’m happy (x14)

No wonder I love this song. Tablo and JW? Mmm.