http://youtube.com/watch?v=a-meyXqG38USkins
The StoryTony (black haired guy) had been sleeping around and had treated his girlfriend (michelle) like ****, he was calling to apologise and couldn't get phone signal so he went into the road for a better signal.
Sid (guy singing most of the song) is a loser at school and the entire show, shows how he is unsuccessful in everything especially love and is still a virgin. He is in love with Michelle but suddenly has fallen for Cassie (girl at the end with blonde hair) who is battling with depression.
Anyone that's a crap description, it is an awesome ending to the show though, especially the song. Enjoy.