The song expresses about emotional of boy that he felt with his girlfriend. In part of lyrics,It talk about the beginning of them until they're love.

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The song expresses about some people try hard  to do for someone.
However, that person didn't care anything that he didn't.

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The song expresses about lover that give a promises, they are going to love until last breath.

The song expresses a boy trying to apologize to his girlfriend.
However, it is not success and they have to separate on their ways.