Obsession. An idea or thought that continually preoccupies or intrudes one's mind.

Surely that wasn't happening to him, was it? He was merely observing his rival, making sure you couldn't get ahead in the game. You were his biggest speedbump on the road to World Driver's champion and it made him lose it.

The tension was high, only realising he'd been holding in his breath when you'd mock him for it. You were like a poltergeist, haunting him and sending his stress levels into overdrive on track and doing your best to mess with his head off track as well.

Charles had begun to observe you ever since he realised you were serious competition. He wouldn't say stalking, he wasn't going out of his way to see you... At least not off grid. On race weeks his eyes would stick to you like caramel, trying to study you and predict your next move. If he could grasp your personality, thoughts and whatnot, he could use it against you in the races.

You had finished first, with Charles barely behind you in second, and were now giving an interview when your eyes suddenly locked with Charles's. He was observing you from afar, his eyes locked onto you, giving you a certain, almost sultry, look as you spoke. An almost unnoticeable smile crept onto his lips as you noticed him "Go on." He mouthed, waiting in anticipation for your next move.