Seto and Yami walked side by side as they walked to their classes. They were quiet, but everyone knew what was going on. Every day was the same thing. One of them would say something to antagonise the other and they would begin to playfully hit each other. Sometimes they would try to trip the other while other times they would shove each other into the nearby lockers. It was a well-known secret that the two were smitten with each other, and everyone gave the duo a wide berth every morning.
They were about halfway to class when Yami said, "Y'know, Kaiba if there were to be an apocalypse, your ego would be one of the few things to survive unscathed." Seto's reply to that was a quick slap to the head, and Yami simply punched him in his side. The two smirked then laughed.
"There'd be one other thing that would survive too," Seto said with a triumphant smirk.
"Oh? What would that be?" Yami replied, curious as to what Seto could be thinking of.
"Your fangirls." Seto withheld a grunt as Yami punched his side again. He got payback right before entering the classroom, though. Yami got his head nearly crushed by the door.
Kudos to whoever gets the apocalypse joke. :)