It was a Korean drama and I don't know what the main storyline was because I just watched an edit of this side couple. The boy works at a coffee shop and im pretty sure he's deaf and the girl is younger then him, she's in highschool so they don't end up together I'm pretty sure. The girl is spoiled but she decides to work at the coffee shop to be closer to him. I think I also remember her almost hitting him with a car at their first meeting.