"Where's Barnes to save you now, huh?" The brunette muttered under his breath as he kicked the small, blond kid in the stomach. He smirked at the girl standing near him and wrapped his arms around her waist. "That's what you get for standing up to me, Rogers. Just remember, I run this school."
"Screw you, Stark." Rogers responded, spitting blood onto the concrete.
It was the latest in the long line of rivalries between the men of the Stark and Rogers families. It was for reasons no one could understand, but ever since Steve Rogers' parents had died earlier that year, Tony Stark took it upon himself to continue the rivalry.
High school ended, and years went on. The two never interacted; Tony became the CEO of Stark Industries, a technology company. He had a son with his high school sweetheart, but made her the CEO and decided to focus on the engineering aspect. He fell in love with one of their physicists, Bruce Banner, and they adopted a son together, meanwhile raising the son he shared with Pepper Potts.
Steve, on the other hand, enlisted in the military with Bucky Barnes and served for a few tours, meeting friends like Sam Wilson. His cousin, Clint Barton, on the other hand, had twins with his wife Natasha. The twins just so happened to be the same age as Tony's oldest son.
And they were at the same high school.