Can you fall in love without exchanging a word?

Selective Mutism : 
A complex childhood anxiety disorder characterized by a child’s inability to speak and communicate effectively in select social settings, such as school. These children are able to speak and communicate in settings where they are comfortable, secure, and relaxed.

Starship High, a private high school for students who excelled in the fine arts - specifically the performing arts. And unfortunately, Chae Jaerin (the sister of one of the kinkas at Starship High, Hyungwon) was chosen to join right when she entered her sophomore year of high school. Despite being talented in many ways, she was mute. Everyone thought she only got accepted because of her brother and looks due to the fact that she never even whispered a word. But what happens when someone witnesses her talents when she thinks she's alone? What if she takes his heart with only the sweet honey voice that he heard from her?

❝ The way you sang,
It's as if your voice had found my heart guitar,
And began to play with my heart strings.
To produce the most beautiful melody one will ever hear. ❞