Just Between Lovers OST HELP!!

I'm looking for the song/ost that often plays in Just Between Lovers. Specifically in episode 9, where the singer says, "it's been gone, it's somewhere. Every time when I sing, it's so great its okay. Please let you be what I know. It's been gone, it's somewhere. I sing you song, you sing along. You sing my song, I sing along."

I'm gonna crazy! It's impossible to find it! I searched everywhere...

 tochable:

I'm try to find this out too

it is not released yet https://www.youtube.com/watch?v=WljmQ-W6aJw