They didn’t wait.
I turned eighteen at midnight. By the time they walked me into the clearing I had been eighteen for a few hours and it already felt like a different life. The bite on my shoulder from months ago had been itching all day. Tonight was the first full moon since I became old enough for it to take. First moon. First time the pack would have me as a man and then as whatever came after.
I was shirtless. Dark shorts. Barefoot. Pine needles under my soles, cold air on my chest. The fire threw just enough light to show their faces. Someone hooked a thumb in the corner of my mouth and pulled. Someone else stepped in behind me, shoved the shorts down just enough, and spat into his hand.
“Eighteen,” he said. “Still human. Feel it while you can.”
Two fingers first. Then his cock. No patience. He shoved in and I made a noise around the thumb and the man in front of me replaced it with himself, thick, already wet, pushing until I had to breathe through my nose and still choked. They used me like that. Bent over the fallen oak, shorts around my thighs. On my back with my knees shoved to my chest. On all fours again, bare feet slipping in the needles, while one of them fucked my throat and another took my hole and a third stood over me stroking himself onto my bare back.
I came once with a cock in my ass and a hand on my throat. Vision went white. They didn’t stop. Someone else took his place while I was still twitching. I could feel their cum leaking out of me, running down my balls, cold air on it. One of them held my head down and told the others I was tight, that I was shaking, that I was going to remember my first night. Another one laughed and pushed in beside the first man’s fingers, stretching me wider, and I screamed around the cock in my mouth.
They passed me. One after another. Spit and sweat and the wet sound of them taking turns. Someone bit my shoulder hard enough to bruise, right over the old mark. Someone else put his mouth on my cock while two of them used me from behind and in front. I came again, helpless, and they kept going. My hole was sloppy with their cum. My mouth was sloppy with their cum. I could taste more than one man. They wanted me while I was still eighteen and soft-skinned. Shirtless. Barefoot. While I could still feel everything as a man.
The moon cleared the trees.
It started in my spine.
A deep, wrong pop, like someone had taken a wrench to the base of my back. The man inside me at that moment went still, then laughed under his breath and kept thrusting, slower, watching my face.
“Here it comes, pup. Birthday present.”
My hands went first.
I was trying to brace myself when the fingers started to stretch. Each knuckle popped, wet and sharp. The palms lengthened. Skin went tight, then split at the tips as black claws shoved through. I tried to make a fist and couldn’t. The joints wouldn’t close. I stared at them in the firelight, longer, narrower, already not mine, and the sound that came out of me wasn’t words. The pain was bright and specific. Bone moving where bone should not move. I screamed into the dirt.
Then my feet.
I was on my belly when the first crack ran through both arches at once. Bare human feet on the pine needles. Then the bones didn’t just break. They drew out. Toes stretching. Metatarsals lengthening. The heel dropping and reforming while the rest of the foot pushed forward into something that wasn’t a foot. I felt every inch. The nails tearing. The skin splitting along the sides. The sudden heavy wrongness of weight on what used to be the balls of my feet.
I screamed.
Not a shout. A raw, tearing sound that went on because the lengthening wouldn’t stop. My feet just kept going. Longer. Narrower. The ankles tilting. The whole lower leg reshaping so I would stand on them differently. I tried to pull them under me and they wouldn’t obey. They were still growing. Still cracking. Still becoming paws while I could feel the human shape leaving them. I screamed until my jaw started to change and the scream broke.
Hair erupted in patches. Shoulders. Thighs. A sudden dark pelt across my chest that itched like fire.
Then it reached my cock.
The shorts were gone or torn. I was still half-hard, smeared with their cum, when the hair started coming in around the base. Thick. Coarse. Spreading fast over my groin, swallowing the pale skin, crowding the shaft until my cock looked like it was growing out of a dark nest. It kept going. Down over my balls. My testicles drew up tight against me as the fur closed around them. Dense. Hot. The sac shrinking and tightening while hair covered every bit of skin that had been bare a minute ago. I could feel it happening. The itch. The sudden weight of it. The way my balls sat differently once they were buried in that new pelt.
My foreskin moved on its own.
It had been half-covering the head, slick from everything they’d done to me. Then it pulled back. Not from a hand. From the change. The skin tightened and slid, and the human head started to go with it. The tip narrowed. Tapered. The rounded shape I knew flattened into something pointed, redder, wetter. A hardness I had never felt before set in along the shaft, like bone where there had only been flesh. Behind that, at the base, something swelled. A knot. Thickening under the new fur, locking into a shape that was not a man’s. The skin at the root folded and drew in as if a sheath were forming, furred, hiding what had been bare. I felt every millimetre of it. The foreskin gone. The head no longer a head. The knot pushing out against the hair. The air hit the wet, pointed tip and I made a sound that wasn’t human anymore.
Someone was still holding my hips. Someone else had a hand in my hair. They didn’t let go while my spine stacked. Vertebrae pushing. The wet grinding noise of it filling the clearing. My face shoved forward. Muzzle. Teeth crowding the mouth until I couldn’t close it. The tail forced its way out last, a thick, painful unfurling at the base of my spine that made me howl. Ears tearing and reforming higher on my skull. The world went smell-first. Their sweat. Their cum still on me. The earth. The other wolves waiting inside the men who stood over me.
When it finished I was on my side, panting, huge, new. Fur matted with dirt and drying cum. My cock was no longer a man’s cock. Tapered. Knotted. Sheathed in fur at the base, the head gone, the wet red tip exposed, balls tight and hidden in the pelt. The long new paws twitched against the moss. I could still feel the ghost of how my bare feet had stretched. I could still feel where they had been inside me. Eighteen and already not only a man.
They watched.
Then they started to drop.
One by one.
The first man, the one who’d had my mouth first, went to his knees with a grunt. Same cracking. Same stretching. Faster than mine. His clothes tore. When he rose he was already on four legs, larger than me, circling, scenting the cum they’d left on my fur, scenting what was still wet on the new shape of me.
The next followed. Then the next. Bones. Hair. Muzzle. Tail. Steam off their bodies in the cold. The smell of the pack thickening until it was the only thing in my new head.
The last one, the oldest, the one who’d held my hips the longest while I was still soft, waited until the others were already changed. He looked at me, still human for three more breaths, and said, “Eighteen. Pack’s bigger tonight.”
Then he went down too.
When they were all wolves they closed in. No more talking. Just bodies. Heat. The new pup in the middle of them. Teeth at my scruff. The same men who had just been inside me as humans taking me again in the shape we all wore now. Knot and heat and the smell of the pack. My new paws dug into the earth. One mounted me. Then another waited his turn. I howled and they answered.
The pack had grown.
I was theirs.