This song is called Boyfriends, by Megumi Toyoguti. Boyfriends kinda have to do with the manga, so I chose it. ^_^ Anyways, the site ish under some major construction! It'll be up soon!
Story
All of the girls love a boy named Tsume. But the thing is, they're all best friends. They all can't just accept the fact that their friends are trying to get him. So they all fight with the curses they've been given, but will all this fighting go too far? Will they risk their friendship, and lives? Check it out, in Love Combat! ;)