The mv actually has a really deep meaning to it. At the beginning, it shows jiyong running from the police, and then it cuts to him calling the girl on the phone. She picks up, but he isn't at the phone anymore, so she leaves and begins walking. Basically, what happens is that she's abused by the guy she's with. She can't take it anymore and ends up killing him the next time he tries something. Right after that, jiyong enters the room and finds out what happened. He pushes her outside and makes himself look like the one who committed the crime by covering himself in blood, and he's taken away by the police. In the end, he's in jail, and the woman comes to see him. The song's meaning itself is separate, but this is the meaning of the music video:]

I think this song expresses the feeling that the one person who completely empathizes and understands you in life gives. When in a time of despair or sadness, all you need is a good friend who will always be there for you when you need it, and you can make it through. Everybody has their own unique qualities, and you have to come to find them and accept them as part of yourself. When on the path to achieve this, everyone needs one person to stand up for them to lean on from time to time. The lyrics really express the feelings of love and gratitude towards that said individual.