Disclaimer: I don't own Thor.
500 years ago
Loki knew how to walk silently. It was a skill he had perfected as a child sneaking around to play his pranks. It was useful for another reason now. Loki used his hand to cover his mouth when he wanted to giggle, since he knew that they couldn't be seen. His other hand was in Atli's own hand as Loki pulled him along. Atli wasn't as familiar with the layout of the castle as he was. Although if Loki was being perfectly honest Atli could probably find his own way. Atli was a warrior in training a very good looking warrior in training and very smart and sweet. Atli was a couple of centuries older than him and unlike Loki had the blond hair blue eyes that most of the rest of Asgard did. Atli had broad shoulders and was a couple of inches taller than Loki was as well. He like Thor looked like an ideal Asgardian. Loki for a moment felt a surge of envy but then got distracted by how attractive Atli was.
Loki grinned as he held Atli's hand, feeling like just holding his hand made him warmer. That was quite the feat since he always seemed to be cold. Loki reminded himself that it was just three more corridors than they would finally be alone. Loki looked around the corner and when he saw it was clear pulled Atli behind him. Loki speed up in a little in anticipation. The corridors were dark since it was past midnight. Midnight, though, was the only time that Atli could be away and not get into trouble. At least that was the goal to not get Atli into trouble. Loki frowned momentarily at the thought of being caught but then smiled again because it was unlikely that Atli would get caught. Loki had left an illusion of Atli sleeping and as long as nobody got too close in the night then nobody would know. Loki turned one last corner and saw his room. They would be safe in there. Loki picked up the speed a little and Atli picked up the speed even more as they ran into Loki's room.
As soon as the door was closed Atli pressed him into the wall. Atli liked to take control and because Loki loved him he let him. Even though that wasn't normally what he would do. Atli pressed his tongue against his lips and Loki allowed it. It felt so good, so nice. Loki couldn't belief he was going to have to wait another week before doing this again. He shoved that thought out of his mind. He convinced himself that that just meant he was going to have to enjoy it enough to make it last the whole week. Atli pressed his hand to Loki's stomach under his shirt and said with his voice filled with lust.
"Mine." he said stroking his stomach. Loki nodded his always his. Loki found himself suddenly without his shirt but he didn't mind he most certainly didn't mind.
A/N: I don't write smut so this is about as close as we're going to get to it maybe a little beyond but no actual citrus. The M rating is for violence and later angst.