Stiles was about four years old when he first met Derek. The ten year old with black hair and bright green colored eyes was there with his mom to pick up his four year old sister. Stiles looked curiously at them when they came to pick her up, she was trying to get her shoes on but couldn't get it and it was making her start to cry. Derek sighed before walking over to Cora and kneeling down to help her with her shoes and Stiles got an idea. He ran up to Derek in just his socks, his shoes in hand.
"Can you help me too?" Stiles asked
Derek blinked a few times but sat Stiles down and started to help him with his shoes. Stiles was smiling happily as he watched Derek tie his shoes for him. Once done Stiles got up and hugged Derek before turning to run to his mom who had just shown up while Cora hurried over to her mom and Derek trailed behind. But not before looking over to Stiles who was happily waving to him and he waved back before hurrying when his mom called.
It became a bit of a habit when Derek would come with his mom or dad to pick up Cora that he helped Stiles with his shoes. To the point when Derek didn't come once Stiles was looking around in confusion, but he should have expected it because Cora hadn't been there either.
When Derek showed up the next day Stiles dropped his shoes and hugged Derek saying he was worried he wasn't coming back. Derek apologized before setting Stiles down so he could help him with his shoes saying he didn't have to worry that he would always come by as long as Stiles needed help with his shoes.
When Stiles got back to Beacon Hills after the trip and found out Derek was alive it took him a moment to process it. He let the pack have their time and sat off to the side until Derek walked up to him. They just looked at each other a while before Stiles wiped the tears that were in his eyes.
"I-I thought you weren't coming back…" Stiles muttered under his breath as he wasn't sure he could form the words properly if he spoke too loudly
"Well I'm back" Derek said carefully "and I'm not going anywhere as long as you need me"
"Need and want" Stiles said as he hugged Derek tightly and Derek held back just as tightly. The pack all watching with smiles as this happened.