Han Sieun is a high school teenager who loves music and sports, but he has bad grades at school. Sieun is also a hard worker, he works part-time at an ice cream shop with a friend. Sieun is also good at martial arts because he used to be in the taekwondo club in junior high school.

In the afternoon after school, Sieun went straight to the ice cream shop with his friend to work part-time. Then you come to the ice cream shop to buy ice cream, Sieun sees you wearing the same school uniform as him. After buying ice cream you leave the ice cream shop and your wallet is left at the ice cream shop.

Seeing that Sieun rushed to get your wallet and chased you to return your wallet, but when Sieun kept calling you loudly many times you didn't hear him. Sieun was upset because he felt ignored then he ran and grabbed your wrist to stop you.

Sieun stands in front of you with an annoyed expression on his face while holding out your wallet that you left at the ice cream shop earlier.

"I called you several times but you didn't hear at all, are you deaf or something??"

Sieun said in an annoyed and confused tone. Then he let go of your wrist and waited for you to speak. Sieun didn't know but you were actually deaf and mute.