This is definitely something I never thought I would write. I'm not even going to lie: this is pure Alec/Sebastian, and it's very loosely based off of Lion King 2. I was sad there are pretty much no stories that mainly revolve around these two (there is probably a good reason for that, but...), so I decided to make this. I own nothing but my shame. Enjoy!
It was a chance meeting that changed everything. Neither of them expected it, and neither had known how important the other would be to them. All they cared about was their friendship; nothing else mattered. It would never get more complicated than that. Except they were children then, and they could not see how revolutionary their actions were. They did not want to be revolutionary; did not need to be.
All they needed was each other, and even when everything changed around them, that stayed the same forever.
The battle was on, and Alec was not going to let the mud win. His boot had only sunken few inches in, so if he pulled just a little harder, he'd be out. Alec grabbed a tree branch right above his head and used it to heave himself out of the marsh and onto the grass a few paces away.
Alec knew his mom was going to yell at him for sneaking out to the marshes, but it was her fault he left anyway. If Queen Maryse (a title Alec believed his mom deserved because she was, in fact, a drama queen) would just stop getting fussy about Alec spending more time with Magnus and Ragnor then the Penhallow Kingdom's princess Aline, Alec wouldn't run away from home. But the real world was a cold place, and Alec was left with his mom saying, "I don't hate Magnus, honey, you'll learn when your older" instead of a lighthearted, accepting parent who realised that Aline was as interesting as a brick. Alec's father disliked the Penhallows as well, but Alec figured Ragnor would probably swim in the palace duck pond naked before King Robert Lightwood would question his wife. Alec figured everyone called him king out of pity, for all the power he had in the household.
Being nine sucks, Alec thought as he kicked a pebble to unleash his inner fury. The tiny stone landed next to a tree a few paces in front of Alec, so he walked over to go pick it up and deliver more punishments upon it to make up for his misery.
After kicking the pebble once more, a snarky voice called from somewhere above Alec's head: "Did that particular rock offend you, Lightwood?"
Alec jerked his head up and caught sight of a pale boy about his own age lounging in a tree like he owned it. He looked arrogant and his words were rude, so Alec didn't like him.
The boy jumped from the branch he was on, sending his pale hair flying, and landed next to Alec. His black eyes glittered as he waited for an answer.
"Lightwood?" Alec echoed, wondering how the annoying kid knew his name.
"Well, that's what you are isn't it? You're from the Lightwood Kingdom, that way." The kid jerked his chin in the direction Alec assumed he was supposed to believe his home kingdom was. This answer was really troubling for Alec. No matter how mad he was, Alec loved his mom and was not actually planning on leaving the outskirts of his kingdom.
"You mean, this isn't the Lightwood Kingdom anymore?" Alec's voice was much smaller than he wanted it to be. Pull it together, Lightwood. This boy must be a Morgenstern, he will murder you if you look weak, he thought.
"'Course not, dummy. You're in Morgenstern kingdom. Lost?" Alec did not want to admit it, but the boys black eyes were teasing, not murderous, so he figured it was fine.
"A little." The other boy nodded, and thrust out his hand in a slightly awkward motion that Alec didn't expect.
"I'm Sebastian, but you can call me Seb if you want. That's what everyone calls me. Or at least, that's what I wish they would call me. I'm mostly called annoying runt."
The last sentence was added with a humble tone that was a surprisingly different from the rude boy Alec assumed Seb was, but it wasn't unwelcome in the least.
"I'm Alexander, but you can call me Alec." Alec did not continue to tell Seb what people normally called him, because something said that the boy wouldn't want to hear about Alec being called prince.
"I can get you home, Alec. It's pretty far from here, but we can make it before sundown. C'mon, if we go now we can avoid the guards."
They set off, and Alec appreciated his new friend for reassuring him about the guards. They frightened Alec, because they were always so cold and strict. King Robert Lightwood had put up the guards after the war with King Valentine Morgenstern a few years before Alec was even born. No longer was the Morgenstern Kingdom allowed to trade with the Lightwood Kingdom, and Alec knew that was not a good thing for the Morgensterns. The Morgenstern kingdom was bleak and dead; nothing grew and the people were starving because of it. Even Alec, who was typically left out of discussions of politics, knew that.
"So, how'd you get lost?" Seb asked, interrupting Alec's daydreaming.
"Oh, I was just thinking, and it distracted me," Alec answered a little sheepishly. Sebastian chuckled, and Alec rolled his eyes at the outsider's amusement. "It's not that funny."
"Well it's funny because you were thinking just now, weren't you? You seemed like you spaced a bit. It's a bad habit, you know," Seb reprimanded lightly, shoving his hands in his pockets as he walked.
"Yeah, thanks mom. I've already heard that more times then I can count," Alec grumbled. Seb laughed, and Alec thought he had a nice laugh. Their little walk continued on for a bit longer, and before they parted on the border between their two kingdoms Seb dared Alec to come back. Alec decided he would.
It lasted a year before they were caught. A year of mud fights and hand-holding and long talks at sunset. It was the best year Alec would have for a long while, despite Magnus' constant jealousy over "Alec's new, mysterious best friend." When they were found out, King Robert and King Valentine were reminded of old conflicts by their sons' friendship, and it did not sit well with them. The Morgenstern Kingdom rose up and attacked the Lightwood Kingdom.
The Uprising did not last long; it ended in King Valentine's death and Queen Jocelyn's sworn revenge on the Lightwoods. But Alec didn't care about that. He mostly cared about the eight foot tall wall built between the kingdoms and his lost friend.