Thunderlane and Flitter hugged each other and Clouchaser giggled.
"So, this make us coltfriend and fillyfriend?" Thunderlane asked.
"I think so." Flitter said.
The young couple happily rubbed muzzles.
"I'll leave you two alone now." Cloudchaser said, smiling. She trotted away from the statue and saw something terrible: the bully Score chasing the colt from earlier.
"Come back here, brat!" shouted Score. "My hooves want to meet your muzzle!"
The filly looked back. Her sister and her friend were nuzzling each other's neck, too busy to pay attention on their surroundings.
"Oh my gosh, oh my gosh, oh my gosh, what do I do?"
Rumble was happy, but he was also scared. Who wouldn't be?
"I'll beat you until my hooves start bleed-- Oof!"
The colt turned around to see what happened. Turns out that Cloudchaser had connected her head with Score's stomach, making him stop. He fell on the cloud, gasping for air.
"Do-Don't you dare to lay a hoof on him." she said.
"Out of my way, filly."
"N-No."
"Out of my way, if you don't want me to beat the hay out of you as well."
"Then do it. Do it! I doubt you have the courage to do so."
Score raised his hoof and Cloudchaser closed her eyes. He was about to hit her when Rumble headbutted his chest, making him fall.
"Give up, Score." he said, flaring his nostrils. "You're outnumbered."
The bully looked at both foals, then took a step back before flying away. "You're lucky Dumbbell and Hoops are at that stupid summer flight camp."
"Are you ok?" Rumble asked.
"Yes. What about you?"
"Fine. Thanks for saving my rump."
"It was not--" she gasped. "You're bleeding!"
"Oh, that's nothing."
"That's not nothing. Follow me, we gotta clean it before you contract an infection or something worse."
"O-Okay..."

Cloudchaser's home. She was holding a handkerchief with a small blood stain on it and Rumble had cotton in his nostrils.
"Feeling better?"
"Much better. Thank you, Cloudchaser."
"It was nothing. But I still can't believe I attack somepony."
"You didn't 'attacked' Score. You protected me. If it wasn't for you, I'd be in a hospital bed with worse things than a bleeding nose." he hugged the filly, making her blush. "Thank you."
She then smiled and hugged him back. "You're welcome."
After a few moments of silent hug, Cloudchaser said:
"Hey, Rumble."
"Yes?"
She broke the hug and looked in his eyes.
"There's something I'd like to ask you."
"Go on."
"You look a lot like Thunderlane's little brother. You even have the same name. Why?"
"You wouldn't believe me."
"I'm very open-minded."
Rumble sighed. "I'm from the future!"
"Wh-What?"
"See? I knew you--"
"Is something happening on the future and you came back to warn us?"
"No. Well, a lot of things have been happening lately, but nothing we couldn't handle. Actually, I was sent back by accident."
"Oh. Another question."
"Yes?"
"Are we close friends?"
"Well, sometimes you and Flitter foalsit me, and we have a lot of fun."
"Do... Do you like me?"
Both foals blushed and looked down.
"Yes... Yes I do..."
Cloudchaser nervously kissed his cheek. Rumble's heart skipped a beat and he blushed even more.
"Si-Since in your time I'm older than you, le-let's enjoy while you're here a-and we're around the same age."
They nuzzled each other's neck for a while.
"Do you think I'm being hasty?" she asked.
"Well, since in my time I know you for years, I don't think you're being hasty."
"Well, then... Wi-Will you be m-my co-coltfriend?"
Rumble smiled and nodded fiercely, but soon his smile was replaced by a sad face.
"But when I come back to my own time we won't be able to be together..."
Cloudchaser smiled and nuzzled him.
"If that makes you feel better, I promise I'll wait for you to grow up."
"Y-You will?"
Cloudchaser smiled and nodded. Rumble nuzzled her.
"Thank you."

The four foals were on the same park from before. Rumble and Cloudchaser explained everything about him.
"Wow, my little brother is a time traveller. He's not even a year old and I'm already surprised!"
"But there's a problem." Flitter said. "Since you were sent back in time by accident, how are you going back to the future?"
"I... I don't know..." Rumble said, looking down.
Suddenly, a loud explosion startled them. They all looked up and saw a seven-colored glow spreading across the blue sky.
"Wh-What's that?" Cloudchaser asked.
Rumble smiled. "A Sonic Rainboom!"

The loud noise startled the filly Twilight Sparkle, that lost control over her magic. Purple beams of magic flew aimlessly around the classroom. The dragon egg hatched as she was supposed to do, but that was not everything: the four teachers were lifted off the ground, Twilight's parents were turned into plants and the baby dragon grew enough to break the ceiling. One of the beams escaped through an open window, like it was being dragged by something.

Cloudchaser looked at Rumble's flank and gasped.
"Rumble, your flank!"
The other foals looked at his flank and gasped as well.
"What's--"
Rumble looked at his own flank. Where usually there was nothing, now had a winged golden shield with a small golden hourglass in the middle of it.
"My Cutie Mark. I got my Cutie Mark!" he then started bouncing happily and flapping his wings. "Yes! I got my Cutie Mark."
"What does it mean?" asked Thunderlane.
"Maybe my special talent is helping ponies solving affairs."
While they were talking, Rumble's coat started glowing. A faint purple glow.
"Ru-Rumble, why is your coat glowing?" asked Cloudchaser.
He looked at himself and noticed that he really was glowing. "I... I have no idea."
None of them noticed the purple beam approaching until it hit Rumble's back.

The magical beam hitted the wooden wall and was reflected, hitting the young colt that only noticed the purple ray when it was too late. There was a big flash and smoke filled the first floor of the library.
"Spike." Twilight called between coughs. "Are you ok?"
"Yes."
Once the smoke cleared, Spike looked around and noticed a silhouette on the area where the beam hitted and there was still a cloud of smoke.
"Twi-Twilight. I think you hit somepony."
"Oh my gosh!"
They heard a groan, what made Twilight relax. "He's alive." she thought. "That's good." Once all of the smoke dissipated, they saw a stallion lying on the ground. He had a light grey coat, a blue mane and a golden winged shield as Cutie Mark.
"A-Are you ok, sir?" she asked.
He groaned again and got up, opening his purple eyes. "Yes, I--" he said with his deep voice, then suddenly closed his mouth with both hooves. "M-My voice." he looked at his hooves, and then at his flank, relaxing when he saw his Cutie Mark was still there. He looked at his wings and flapped them. "Wow, they're so big."
"Are you sure you're ok?"
"I think he hit his head on the floor a little too hard!" whispered Spike.
"Don't be sily, Spike!" she turned her attention back to the stallion. "Sorry about that. You startled me while I was working on a spell. My name is Twilight Sparkle. I've never seen you around here."
"I'm Rumble."
"RUMBLE?" the librarian and her assistant shouted at the same time.
"Yes." he checked himself out again. "Looks like I'm a grown up stallion now. Thank you, Twilight Sparkle. Now I must go. I have another affair to solve, now that I'm big."
Before another word was spoken, Rumble opened the library's door and took off.
"But Rumble is Thunderlane's brother, right?" Spike asked. "Isn't he a foal?"
"Yes. Yes, he is a foal."
"Do-Does that mean your spell actually worked?"
"I-I guess it did. This is not good."

Cloudchaser bucked another cloud and wiped with her hoof the sweat on her forehead.
"This job is tough..." she thought.
She flew toward another cloud, but somepony bucked it before her.
"Hey! Not that I'm not glad for the help, but everypony on the team was assigned to clean a different area and I doubt you finished yours in such short amount of--" her eyes caught a detail on that light grey stallion that made her eyes go wide: the golden winged shield on his flank. "...time."
"Look, Cloudchaser. I'm a grown up stallion now."
"R-Rumble... What...? How...?"
"Long story."
Cloudchaser hugged Rumble, who hugged her back.
"When that magical beam hitted you and you disappeared we grew so worried." she said, shedding tears. "We thought you died that day."
"Well, I didn't."
"Since then I spent as much time as I could with the other you, hoping that day would never come."
"But did you... Did you keep your promised?"
Cloudchaser smiled and wiped her tears.
"I was attracted to a lot of stallions."
Rumble looked down, his ears flat against his head.
"But..." she said. "Everytime I looked at you, I remembered the promise. Even though we thought you were dead, I still had hope. Deep inside me, I knew you were alive."
He hugged her. "I'm glad you kept it."
She hugged him back.
"But what about Flitter and my brother? Are they...?"
"Probably skipping work to go on a date."
"Well, at least they're still together. I really changed the future. Hope there are no repercussions."
"I was jealous, actually. Seeing my little sister cuddling and kissing her coltfriend every day while the one destined to be my lover was just a foal that barely had any idea of what they were doing."
"But here I am now. Grown up and completely aware."
Cloudchaser giggled and kissed his forehead. They then looked deep inside each other's eyes and leaned closer.
"Hey, slackers!" shouted a mare not too far from there.
They looked toward the source of the voice and saw a cyan mare with rainbow-colored mane and tail glaring at them with crossed forelegs.
"Ca-Captain Rainbow Dash." Cloudchaser stuttered before pushing Rumble away from her.
"Remember rule no.6?" she said. "Lovey-dovey stuff only AFTER your duties are fulfilled."
Cloudchaser saluted her. "Y-Yes, ma'am!"
Rainbow Dash nodded and flew away.
"Later?" Rumble asked.
She smiled. "Later."

Author's Notes:

Sorry about my grammar. I typed this chapter in a hurry and had no time to check everything. Leave on the comments the mistakes and misspelling I may have made and I'll fix them ASAP. Thanks again!