Warning: smut (a lot of it)

It was 7PM and Stiles was impatiently blogging while waited for his dad to leave the house. He looked through his window and thought of what Derek meant by "tonight", since he doesn't even own a clock. Stiles decided to wait until 8PM, which would gave him a bit of time to prepare.
"Son, I'm off," his dad called from downstairs. He wouldn't be home until 7AM the next day so Stiles would be safe.
"Okay dad," he yelled back. He watched his dad ride off the driveway, and disappear behind the nearest street corner. While he turned around and looked at the pile of clothes in the corner of his room, he thought to himself: What should I wear?
He had hid his torn shirt under his matrass so that he could always sniff it and recall the memory of the sexual tension he had with Derek while he masturbated.
While rummaging through the pile, his red hoodie that he had worn the day before, caught his attention. It had a few mud stains on it but that didn't bother him. He smelled it, hoping to recognize some scent of Derek, but all he smelled was the freshness of the blooming forest. "Clean enough," he said to himself.
He grabbed his deodorant and questioned if he should smell nice. Maybe wolfs like it the dirtier, the better? he thought.

He closed the door of his house behind him. After a long time of wondering about what he would do and how he would act around Derek to turn him on, he was finally ready to leave. With a clear, confident mind, he wandered into the forest.

He stood in front of Derek's door. Dusk had already fallen. A heavy vibe of nervousness found its way from his heart throughout every nerve in his body. He triple-knocked on the old wooden door. Of course he didn't expect Derek to open it and invite him over to the dining table for a nice glass of wine and some fresh made muffins, so he opened the door himself. The first step he took in Derek's house made a squeaky sound. He felt frightened by the thought of Derek scaring him by suddenly appearing somewhere again. But all he experienced was the encirclement of a dark void. He wondered if he should've watched some porn before he left his house because he didn't feel like fucking Derek at all.

"Already here?" he heard Derek say from somewhere he couldn't figure out.
"Where the hell are you?" Stiles asked, looking around like a hyperactive squirrel.
"Look up you idjit." Derek was standing on the highest stair. Only his silhouette was visible because of the contrast between the light that vaguely shone through his half wrecked walls and his underexposed skin.
Stiles went upstairs, step by step. He discovered Derek being shirtless. The closer he got, the more details of his smoking body got revealed.
"Hey," Stiles awkwardly said, feeling a little bit substandard by Derek's perfectly trained abs.
Derek said nothing. His eyes were bright and full of lust. Without one word spoken, the sexual tension between the two was palpable. Stiles breathed softly through his mouth while he kept switching his sight from Derek's lips to his eyes. Derek came closer. He slowly laid one hand on Stiles' butt and stroked it. The skinny boy felt a bit compressed and put his hands on Derek's muscular chest that was now so close against his, he could almost smell the sweat that made it look so smooth and shiny. He felt Derek's hand slowly going from stroking his buttock, to fingering the backside of his ball sack. Stiles felt his soft cock grow harder and harder until it was so thick, the pressure in his pants almost hurt. He made a soft groan and licked his upper lip. Derek could feel Stiles' erection press against his. Even he couldn't bare the tension any longer. He suddenly pushed his lips against Stiles' and grabbed his balls. He gently cupped them while he interrupted the wet kiss for a moment.
"I'm going to fuck you so hard," he whispered into Stiles' ear. Stiles surely felt like fucking now.

Derek had carried Stiles into his bedroom and had shut the door. Since there wasn't any sign of electricity in the house, the room was fully lit up by a few candles. Stiles was ready, he was lying on Derek's bed with his legs spread open, ready to get fucked painfully hard. Derek ripped off Stiles' pants and started licking his bulge until his boxers got wet and see-through. "Suck me," he demanded after he couldn't bare the mild fore-foreplay any longer. Derek ripped off his boxers. A large, hairy uncut cock revealed itself. It was perfectly veined. He started sucking it roughly with his hands now underneath Stiles' shirt, rubbing his nipples. Stiles panted intensely. He felt like exploding from the pleasure while he tightly held on to the metal bars of the bed. The bars that were now a bit loose because of Derek's violent escaping actions the day before.
Derek suddenly lowered his tongue to Stiles' hairy entrance. He spread his butt cheeks so his tongue could easily find its way in. When he finished licking it until it was wet and slippery enough, he slipped his index and middle finger into the hole and rapidly fingered him while teabagging his balls. When he finished, he let Stiles lick off both of his fingers. Stiles sat up straight and undid what was left of little clothing Derek had on. A thick dark tinted cock appeared and jumped up right after Stiles pulled off Derek's underpants. It was one of the biggest dicks he had ever seen, even when having a browsing history full of big-cocked gay porn. He tried to jerk of both him and Derek, but Derek's cock was just too thick. As they eventually started beating each other off, Their tongues started making out again. Stiles hit Derek's ass a little who continuously moaned between the kissing. As they were finished with the foreplay, Derek proposed to fuck Stiles. But they both knew that his large cock would never fit in Stiles' tiny hole, especially not because Stiles was still a virgin.
"Put your teenage cock in my ass then," Derek said, panting. He turned around and got on his hands and knees. Stiles first fingered him and used his saliva as lube. After sniffing his fingers and enjoying the never expected smell of Derek's ass, he pushed his cock in as hard as he could, doggy stile. It felt warm and slippery. Slowly, he began to move his hips back and forth. They both moaned as Stiles went faster and faster which made a loud slapping noise. He went with both of his hands through Derek's chest hair. Derek put his teeth firmly together and squeezed his eyes shut. He tightly held on to the bed which kept squeaking with every move they made.
"Turn around," Stiles said. They continued fucking. Except that they were now face to face while they panted heavily to each other.
"Fuck yeah," Stiles gasped after he took a deep sniff in Derek's armpit. He didn't expect to be even more aroused, but the smell of sweat proved him wrong. He grabbed the top of Derek's cock and started jerking it off with the same velocity as he drilled his cock into Derek's ass, while Derek constantly beat his buttocks and begged to go faster and deeper. Stiles' face was all red from the harassment. He was fully covered in sweat and so was Derek. The sheets where they were fucking on had sweat marks which included a huge wet ass mark from Derek's butt. The sweat even dripped out of his hole while Stiles was heavily penetrating it.
"I'm going to come," Stiles forcedly roared.
"NOT YET, I want to switch places first." Derek threw Stiles off of him and got on top. He tried to put three of his fingers in his Stiles' anus as a preparation for his even thicker cock.
"Even though I enjoy your fingers in me, I don't really think your cock fits in there," Stiles said while a horny smile formed on his face.
"We'll see," Derek said as he slipped his fingers out of him, leaving cords of saliva between his hand and Stiles' open hole. He stuck his cock right in until his glans because it couldn't fit in any further; his virgin ass was just so extremely tight. Stiles groaned from the pain, but when Derek started fucking he actually enjoyed it. It only took a few moves until Derek was ready to cum. He pulled his wet dick out and flipped Stiles over on his back.
"Get ready," he said while he rubbed the front side of his glance off for the last time. His cock squirted out one last drop of pre-cum while his hairy balls were slightly contracting before the big blast. Derek moaned deeply, the veins on his cock were so tense that it looked like it was going to explode. And it did.

A huge amount of semen ejaculated out of his slit, covering Stiles' freckled skin. Derek's groans weren't even human anymore, they were bestial. His fingernails grew into sharp claws while he got more and more hairy. He howled from relief.
Stiles swallowed every amount of cum that entered his mouth. He had never in his life seen that much stickiness on him. It was like a team of basketball players had used him as a jerk off tissue. Even his cock was fully coated. He stood up and pushed Derek back. It was his turn. Although he could barely see because of the cum that sealed his left eye, he placed himself on top of Derek and put both his hands behind his head, allowing Derek to take control of his upright dick. He grabbed his snake by its head and wanked it roughly. To make him come faster, he licked Stiles' nipples and played with his balls a little.
"Rub my hole with your claws," Stiles commanded with his eyes closed. Derek was wondering if he was fantasizing about something kinky. After all, he sure is kinky. After giving Stiles a nice hard hit on his ass, which he answered with a load moan, he massaged his hairy entrance. Stiles looked down at his sweat drops that landed in Derek's chest hair. The smell of cum and sweat that took over the room almost made him come.
"Hit my fucking ass!" he yelled several times. Derek kept on hurting Stiles in all sorts of ways. He knew he liked it and that it had always been his kinky fantasy to get fucked by a werewolf with sharp claws.
Stiles came hard. He blasted out a shower of sperm on Derek's chest and face. He growled so hard, tears came out of his eyes. Never in his live had he experienced such a great orgasm. He was wet and covered in a mix of cum, sweat and some other manly juices, and so was Derek.

Stiles had laid himself next to Derek.
"That was great, we should do this every day," Stiles gasped while his dick was slowly relaxing again.
"Don't get your hopes up," Derek said as he stood up and went to the bathroom to got a towel for him and Stiles. "But we can turn this into a weekly occasion if you can handle that."
Stiles looked up. "I'll visit you once a week," he said, trying to act casual, but all he could think of was falling asleep in the strong arms of Derek after he gave him a goodnight kiss. Stiles picked up his clothes and got up from the bed.
"You're not going are you?" Derek asked when he came back with two towels.
"Uh…" Stiles looked startled, "My dad is probably going to notice I'm gone," he said.
"Then I'll get you home on time." Derek looked a bit happy but didn't really wanted to show it. After all, he still was the sturdy alpha. "Well if you don't mind the dirty sheets of course."
"No! I'm be happy to sleep over." Stiles looked shyly at the ground, then back to Derek. "You're coming to bed?" He said as he jumped into the sticky bed.
Derek blew out all the candles and joined him.

They looked in each other's bright eyes. After they shared a kiss, Stiles turned around. He felt the arms of Derek embracing him, pulling him closer to his warm body. They both fell asleep in spoon position.