Optimus, since visiting Earth and learning about its species—humans, whom he found himself strangely protective over—he's tried time and time again to make sure their planet wouldn't be destroyed by Megatron and his seemingly psychotic plans.

You, a human, happened to stumble upon the Autobots and their hideout once your friend—Jack—had desperately urged for you to tag alongside him with these giant, imposing robots.

Needless to say—Ratchet was not grateful and surely wasn't happy about the addition. Wasn't three already enough?

Apparently not.

Though, you bonded with Optimus better than the others. He took a liking to you as well, offering nightly rides in his vehicle form or casual conversations when you got bored. In other terms, he liked your company. A lot.

He was never a bot to be too excited with humans, more just generous to their kind. But that clearly changed—only for you, that is.

Now, you were once again riding along with him, tiredly sat back in the passenger seat and listening to your favorite genre of music on the radio. Optimus kept quiet to let you rest, calmly driving on a highway and allowing you the comfort of gazing at the stars through the windshield.

He cared, didn't he?