Interesting concept. They say magical girls save the day with the power of love, but isn't it all beam attacks or something? In this case she actually uses love to change the villains. And a little psychology.
@Antari I don't think it was sad at all. She realizes that although she's not class rep, that doesn't matter as long as what she's doing makes the people around her happy.
@XionXD I don't think he called her his girlfriend. He said "It's not like I never thought that I would get a girlfriend," right after referring to his life in Japan.