So I should say now: Only humans that believe Jack can see him, all dragons can see him though. Enjoy.
The 13 year old brown haired Viking climbed up the large tree and laid on a large branch. The sun was just setting which allowed Hiccup to sneak away. He gave a large sigh as he ruffled his hair. "What's wrong now Viking?" He looked up with a smile to see Jack Frost, friend for four years and counting.
"Another dragon attack, I had to sit in the armory and watch Astrid, Snotlout and the twins fight them. It's just not fair." Hiccup ranted as the spirit sat in a branch opposite. "It's just not fair. They get to do something, make their mark on Berk. What have I ever done?" He shouted the last part as he felt a tear fall. Jack sighed, he had to help the boy somehow.
He got up and jumped to a branch above the Viking. He laid on his stomach, gently reaching down his arm to play with the boy's hair and smiling at his form. It was true, over the years he had taken a liking to the boy, well more than a liking. "How do you know that you meant to fight?" he said sleepily, becoming tired in his new spot.
Hiccup shrugged, liking the feeling of Jack play with his hair, "I'm a Viking, all Vikings do is fight dragons. It's what gets you known through history." The sky grew darker so only a faint outline could be seen.
Jack yawned as his arm started to go limp above the brunette's head, "If all vikings do is fight, then how will you know what your meant to do?" He mumbled the last part as the spirit slipped into sleep.
Hiccup grinned at Jack's peaceful face as he grasped his cold hand in his before falling asleep.
"Jack! Guess what!" Hiccup came running through the trees with ease on the first real day of cold, stopping at the largest one where the winter spirit stood for the first time in three months, like always waiting for him. "What happened?" Jack asked quickly, noticing Hiccup's grin. "I got a night fury!" Jack's face turned to confusion, "Wait, you got one?"
Hiccup rubbed the back of his neck, "Well, I kinda shot it down from the sky, didn't kill it, gained his trust and found out how to fly on his back." He said it quickly as if embarrassed. "Why didn't you tell me this before?" Jack asked in surprise, "That's awesome!" Hiccup received a loving punch in the arm.
"You were gone!" Hiccup yelled, smiling at Jack, the spirit smirking, "Oh yea." Hiccup gave a nervous smile as he took the spirit's hand, "Come on!" He started running through the trees to Raven point with Jack behind.
Jack clutched his staff and Hiccup's hand as he kept up with the mortal. They stopped at the edge of the cliff, "Wait here." Hiccup said to Jack and let go of his hand after another second and made his way down to mount Toothless. He did and flew up to greet his friend. "Jack meet Toothless, Toothless meet Jack." The night fury nudged Jack in affection once Hiccup showed he was safe as Jack scratched him.
Jack gave a smirk, "Well he looks fierce, but how well can he fly?" was all Hiccup heard before Jack flew into the sky. "Let's go bud." The pair rocketed into the sky, matching Jack's speed easily before they erupted into a game of flying tag and only stopped when the sun went down. Jack landed in the cove just as Jack finished taking off Toothless' saddle.
"Not bad, not bad at all." Jack said smoothly as he walked to the boy. "See you again, right?" Hiccup asked quietly. "Of course, I'll be back after I sent a storm to outcast island." Jack said as Hiccup laid his lips softly on the spirit's, "Goodbye love." The both hugged a final goodbye before parting.
"This is amazing!" A feminine voice reached Jack's ears as he flew closer to Berk. He looked up to see Astrid on Toothless, behind Jack. He flew closer to listen as they flew calmly through the clouds, "What about tomorrow, you have to kill a dragon." Jack's eyes turned wide, fight a dragon? Hiccup couldn't do that. He flew at top speed back to Raven point to wait, not bothering to listen to any more.
After they returned and Astrid left, after hugging Hiccup, um, how about no? The spirit watched with wide eyes, jealously burning in his chest. Jack emerged from the shadows. "You have to kill a dragon?" He exclaimed causing Hiccup to jump and Toothless to greet Jack happily. "Jack you're back!" He ran up and tackle hugged the spirit, "Only for a little while, I got work to do, now spill." He almost snapped, a slight edge to his voice. Hiccup let go and started explaining his training and the final test.
"Don't do it." Jack said confidently. "What?" Hiccup asked sternly. "Show them what dragons are really like." The Viking sighed, "It's a nightmare, I was almost killed by the exact one before it was captured, what if it doesn't accept me?" Jack shrugged, "Maybe Dragon's don't hold grudges like humans. Like Toothless, you shot him down, damaged his tail and now you're his friend. He put a hand on the confused mortal's shoulder, "Do what's right." He kissed his love on his forehead before flying back to spread winter. Hiccup ran a hand through his hair, no sleep tonight.
Jack looked up at Hiccup as he climbed into the clouds. The winter spirit had been trying to help by freezing the ground to make the Red Death slide on the ice but now his only concern was the frail Viking. The spirit shot into the clouds, coming up next to the giant dragon, the teen hidden enough by the clouds to not draw attention. Plasma blasts to the Red Death made Jack jump in surprise and relief Hiccup and Toothless were alive.
The teen flew around the dragon to wind up beside Hiccup, so focused with Toothless he didn't notice Jack. "What can I do all mighty Viking?" Hiccup's neck snapped to jack, a smirk growing before looking at the furious dragon, "Freeze its wings on the way down then Toothless and I will take it down." Both hearts pounded at they nodded in agreement, Jack jolting forward, freezing the wings to make them harder to open as the Red Death free falled after his boyfriend, after driving Jack away with a cloud of fire. Jack watched in horror, his heart breaking as he heard Hiccup's last cries for help as the tail didn't open and he plummeted into the fire.
Jack landed as the dust started to settle and ran along the beach, staff gripped tightly, "HICCUP! TOOTHLESS!" He cried, tears forming in his eyes threatening to break through. A soft roar from a familiar night fury sent Jack running to his right, toward Stoik. "You saved my son. Thank you." He heard the chief say to the dragon as Jack stumbled up. Toothless looked at him with wide eyes and looked back at Jack with a purring like sound, "Thank you Toothless. You saved the one person I care about."
Weeks went by as Jack wait in hiccup's room before be finally woke up with a start, looking scared of Toothless in his room. Jack sat in down and held him comfortingly as Jack explained the Red Death incident. When the Viking decided he was alright to go outside Jack never left his side. Even though the Vikings running through him and Astrid's advances tore at his heart, his loyalt held strong. Nothing would break the lovers apart.
Not over yet no matter what you think! I got lots planned! Updates are slow just cause I need motivation, sorry about the age skip between chapters I just didn't know what to write. If you read Hold On or Forever and Always those updates will be coming within the next two days and all three of these storues will be update fairly quickly. Thanks for reading!