A story about a simple girl and her best friend Do Kyungsoo who do not realise until it's too late how they feel about eachother. 

And someone else comes into the picture to pick up the pieces...

a painful reminder to never take things or people for granted. 

Kyungsoo-ah. 

I know you're in the army now but...

Just know.

I'm happy. 

I think I'm finally...

Happy. 

Kim Jongin...

Makes me happy.