Wrestling AU.
Sunset Shimmer is the smug bullying heel in the Cantlerlot Wrestling Alliance’s wrestling ring, out of the ring she is the kind loving girlfriend of Twilight Sparkle. She brings Twilight to the wrestling organisation and they become rivals in the wrestling ring. Their onscreen rivalry heats up and the fans can feel the electricity between them.
The picture is Sunset Chop by XJKenny on Deviantart, used with permission.