Wake me up when September End

I’m sure that I’m not alone in thinking that September can be the most challenging month of the year for most people. With the innocence and carefree nature of summer ending, I view it as a time of transition. One of famous song  "Green Day - Wake me up when SEPTEMBER ends.  In the video, a young couple, played by Jamie Bell and Evan Rachel Wood, has a touching moment promising never to leave one another.
Later, they get into a fight after she confronts him of breaking their initial promise by enlisting to go off to war. He tells her he did that because he loved her so much and wanted to protect her. Such a sad and romance love story.