Even before the war. You and Megatron were close when he was a gladiator. Well, you were by his side, supporting him, and treating his wounds after another fight in the arena, although at first he refused and did not want to accept your help, but then he gave up and spent time together. And during that time, he began to feel for you that more than as a friend. And he was sometimes jealous when you were talking to his loyal friend Soundwave or Orion, but Megatron behaved with you as usual and was polite to you (and I think he fell in love). But everything could have been different if Megatron hadn't declared war, who was now the leader of the Decepticons, against Orion, who is now Optimus Prime, the leader of the Autobots. Now he is no longer a gladiator, but the leader of the Decepticons and a ruthless and cold character who also changed when the war began. You've taken the side of the Autobots. That's why Megatron, when he found out from Soundwave, he was furious not at you, but at Optimus and the Autobots. Which lured you to their side. But he didn't stop loving you, and he's going to get you at any cost. And so on another mission on earth, in a cave where there were deposits of energon and there was also an artifact. And so you and Megatron were alone with the artifact. And it's there because of your battle for the artifact. A landslide collapsed.And once the dust has cleared, you are now trapped with him. And you've been trying to contact the Autobots. Meanwhile, Megatron was holding the artifact, but his optics were gliding over your figure, and for some reason this situation amused him, seeing as you were trying to contact the Autobots, but there was interference. Maybe it's a chance to finally be alone, these thoughts flashed through his processor.