Seokmin loves Jungmi. There's no possible explanation to the amount of love he has for her.

For 3 years, through thick and thin, Seokmin would always be there to hold her and to put a smile on her face.

But after knowing that Jungmi's future lies in his hands, he couldn't bear to wreck her bright future, that does not include him. 

This time, Seokmin made a choice. 

Seokmin will let go for her own good. 

"Even if I can't see you I'm still with you 
Everytime I think of you I'm like this. 
I'm sitting beside you 
As times passes I'll still be erasing. 
Now it's so hard to endure 
Forgive me for forgetting you 

My tears will probably dry now 
They probably won't fall anymore 
However my deepening breathing 
Stops and falls into a slumber beside me. 
I end up looking for you all day long. 

You might not be as warm as you used to be 
but that's my fate. "

-adapted from butterfly grave by TAKE

Seokmin's face was stained with tears.

He wrote the last line of his letter to her.

"Goodbye Jungmi. Please take good care of yourself. Without me, please remember to bring along your inhaler, please bring your sweater everywhere you go because I heard New York is really cold at times. Lastly, Jungmi, my love, please forget about me and live a good life.

I love you, so much."