This song is something that is sad. This person can not say what his heart is telling him to say. It seems like he doesn't know how to say what he needs to say. To show how he feels he writes a song about how he shouldn't have open his heart and let someone in. Now that person is inside of his heart he can't say hi or anything that is needed to be said. So he tries to show it without saying a word, thus the title without a word. To me these words hits what people can't say to other people, out of fear of being hurt. However they try to find a way without saying it. In this case he didn't mean to fall in love but now that he has he has no clue on how to handle what he feels. He feels that he shouldn't have looked. That he made a mistake. Now he doesn't understand how to let someone he loves leave. A love mistake.

This song is for someone Hwang Tae Kwan loves. This girl (Mi Nyu) has lost her father and mother growing up. Her brother is across the world having a operation. In many ways he tries to show her that he loves her but she can not see it. So when she asked him to not let his mom sing the song (his mother stole the song) he sang it for her. She herself sings it when she is telling him that she is ok. She also does this to tell him goodbye so she can leave because she is not really needed. However she thought wrong because they now try to get her back. On his finale attempt he sang the song that her father had made for her mother. He finally tells her that he loves her. So the song means a lot of emotional feelings that he can not say out loud to her. He does that by the song "What should I Do".