[Author's Note]

I'm a huge fan of BlackFrost, the OTP consisting of Loki and Natasha Romanoff the Black Widow. I made this AU fic for I wanted to see how they live as teenagers, as well as I want to see them paired :))

Thor © MARVEL

Avengers © MARVEL

I Need You © M83

BANG~!

"What. Did. You. Just. Dare. To. Say?"

A quite small high school girl with red curly long hair spoke intensely while pressing a high school boy with black straight tidy hair to the lockers. The boy tried to catch his breath while his eyeglasses rolled down his nose.

"Wha-what's wrong?" he asked innocently, "I just-I just told the truth that you are fu-fussy like a pu-pussy in heat…,"

BAM! The girl threw her mathematic textbook to the boy's face and left him behind for the bell has ring. Break time was over. The boy took his falling eyeglasses from the floor and put it back on his face. His palm rubbed his painful right cheek before he bent down to take the falling mathematic textbook.

"Again, Loki?" asked another high school girl with a small ponytail while passing before him.

"Hand this to her, please," replied the boy, giving the textbook to that girl, "You should have told her not to be so abusive, Maria, it's so unladylike."

That girl laughed while that boy was still rubbing his cheek. They were off together to the classroom.

The high school was SHIELD High School, a so-called elite school for utterly brilliant and talented students, built on the center of Upper West Side, New York City. Inside one of 10th grade classrooms, Natasha Romanova was knocking her knuckles to her desk, bored with the algebra subject taught by Math teacher, Mr. Phil Coulson. She was thinking of whether she will need to take the same boring subject if she succeeds entering a law school that she was always dreaming about. She sighed.

"Sssh, Tasha."

Natasha turned her head right, to the whisper. A friend handed her mathematic textbook.

"Thanks, Maria," replied her, grabbed the book. The girl beside her was Maria Hill, a fluent speaker of Japanese, French, and surely English, her best friend since they entered high school.

In another side of the classroom, Loki Laufeyson yawned. Like Natasha, he was also bored with the subject but not because he hated it. He already mastered it before Mr. Coulson presented it, that was why. He fixed his eyeglasses and sometimes rubbing his cheek that still felt painful. The textbook thrown to him turned to be quite thick. He looked to his front left, caught a red curly hair, smirked mischievously before he wrote something on a small paper that he wrecked from his textbook.

"Ouch!" said Natasha. Something light hit her head from her right back. She glared to Maria, but Maria shook. She looked down to the floor and found a small ball wrapped by a piece of paper, which must be something that hit her head, and took it. She opened the wrapping paper and found a small eraser, also some handwriting on the paper.

'What's the meaning of stonehenge, fuzzy pussy?'

Natasha glared to Loki who sat behind her and raised her middle finger. Loki wrote something on his textbook before he showed her.

'You barbarian corn hair'

BAM! Natasha once again, threw her textbook right to Loki's face, gave him another pain on his left cheek. All the students and Mr. Coulson were startled, turned their head on those fighting students.

"You two, get out of my class," declared Mr. Coulson. Natasha raised her eyebrow towards him.

"But, Mr. Coulson, it was Loki…,"

"Get out, Romanova, Laufeyson."

"I can't believe you still fail handling him, Tasha, tell me how many times have Mr. Coulson kick you out of his class?" asked Maria, giggled. They were at the school cafeteria, sat on the corner table to have lunch.

"He was mocking me!" Natasha nearly screamed, "How do you tell me not to hit his face after all his pussy-words towards me?"

Maria laughed. She had no more wonders on how her best friend and Loki have always mocked on each other since they knew each other on 9th grade. That time, both Natasha and Loki were candidates for Student Council President with different vision and mission. Natasha's mission was to strengthen the school rules to bring more disciplined students in the future, while Loki's mission was to cheer the school out of the strict rules to bring more relaxed students in the future. None of them won the election, but their rivalry and hostility never stopped.

"Anyway, your parents have set the date?" asked Maria. Natasha nodded.

"Already," she said, "They will leave by early June."

"Hope they enjoy England summer," said Maria, and Natasha shrugged, "Does it mean that you can spend summer holiday with me? You can stay overnight anytime!"

"That could be a good idea," said Natasha, "Unless my parents have another."

"They will take you to England?" asked Maria, a little bit down. She had been quite excited to spend her summer with her best friend.

"Not something like that," Natasha munched her fries, "But I'll try my best to spend the holiday with you, okay?" she said. Maria smiled again.

The bell on Romanova house at Upper East Side rang. Natasha, just finished her early dinner, followed her mother with her eyes from the dining room. Tatiana Romanova opened the front door, welcoming two guests that make Natasha's blue eyes got wider. She ever saw those husband and wife in a Parent-Teacher Association (PTA) meeting and she could not forget them since then. That fatherly man was Odin Laufeyson, an ambassador for some country Natasha did not recognize, and beside him was his wife, Freya Laufeyson, a very friendly woman who never stopped smiling to all the teachers at school and also to other students' parents. A couple that Natasha refused to believe as her biggest enemy's parents.

"What are you doing here, Tasha? Why you no greet Mr and Mrs. Laufeyson?"

Natasha looked up left, to where his father's voice came. Ivan Romanova stood beside her, fixing his red hair.

"I-I can't, Dad," said Natasha nervously, "I don't dress!"

Natasha looked to the guest room and was amazed by Freya's beauty. Her gold long hair fell perfectly with a small braid behind. Compared to her appearance with only old tee and shorts, she was afraid that the beautiful Freya shall judge her even though she knew how friendly Freya was.

"You're right," said Ivan, after looking at her daughter from head to toe, "Go upstairs then, we're going to have a private talk," he smirked. Natasha rolled her eyes, failed to understand what her father's smirk mean, then climbed the stairs to her bedroom. She knew that both her father and Loki's father are U.S ambassadors, yet she never discovered of how close their relationships were. All her life, that night was the first time she ever saw the Laufeyson couple visit her parents.

"Tasha, wake up, wake up."

Natasha opened her eyes slowly and found her parents sit on her bed. She just realized that she fell asleep while reading Abraham Lincoln biography, but at the same time was confused of why her parents looked so excited and cheerful before her.

"What?" she asked. Tatiana smiled widely and looked to Ivan, who nodded excitedly.

"Tasha, listen. We can finally leave NYC with relief!"

"…," Natasha rubbed her eyes, "…of course, you already told me, right?"

"Not this one, Tasha," said Tatiana, "We are going to leave you with relief because we are going to hand you to a husband."

Tatiana and Ivan smiled widely, still sitting on Natasha's bed. Natasha remained silent. She blinked once. Blinked twice. She scraped her ears, just in case something stood on her listening ability, but she only found her ears clean. She started to think.

Husband. Getting married.

"Wait," she asked slowly, "What?"

"You are getting married!" Tatiana and Ivan replied cheerfully. Natasha left her bed, opened her both eyes widely, and stood tall.

"You gotta be kidding me!"

"No, we're not," said Ivan, "Don't you know how worry we are to leave you alone in this big city? All this time whenever I work abroad, your mother stays with you. But this time, I need her. And you can't come with us, we don't want to interfere your dream to enter a law school here."

"But not with matchmaking me with someone I don't even freakin' know, Dad!" Natasha screamed. She could not believe that it was her parents' plan about her, that she once told Maria at school. She first thought that it would be leaving her to a relative, or to Maria's parents whom her parents already know well.

"Tasha, why are you thinking that we will match you to someone you don't know?" asked Tatiana, surprised. Natasha winced.

"What?"

"Of course you know him. You are even in the same class, right? You and Loki Laufeyson?" asked Tatiana innocently.

Natasha opened her eyes slowly. Sunshine came through her closed window. Looked like the morning has come and she fell asleep again. No, she was fainted. Her mother fell asleep beside her, while her father did not seem to be in her bedroom. She recalled what happened last night. She remembered she fell asleep while reading a book, then her parents woke her up to tell her a good news that they will leave U.S with relief because she will be married with Loki Laufeyson, her classmate.

Natasha got up right away and caught her breath.

"No way," she said, "Mom! Mom, get up!" she shook her mother's body.

"…uh, Tasha? You awake?" asked Tatiana before slowly opened her eyes and got up.

"Mom, I can't marry that idiot Loki Laufeyson, and I will not deal with any excuses!" Natasha declared, surprising Tatiana.

"Wh-why?" she replied, "Loki is not an idiot, he is…brilliant. All SHIELD students are brilliant and talented, including you, Tasha baby."

"Mom, come on! Did you never hear how I and Loki have always been enemies since we entered the election?" asks Natasha loudly. She refuses to believe that her mother acts as if she never knows how her own daughter and Loki are rivals and enemies, "I think I have told you many uncountable times that he always makes teachers kick us out of classes!"

"Of course I know," said Tatiana, "But it doesn't mean he is not qualified to be a husband. He is smart, kind, responsible, and his decision to enter election means he has a strong leadership quality."

"He didn't win."

"So did you," replied Tatiana, silenced Natasha, "Odin and Freya will have to work in Japan, Tasha. They are also afraid to leave their only son alone, and they think that it's best to leave him to a wife who will take care of him…,"

"But not me, Mom! Please!" Natasha yelled. She inhaled an exhaled heavily, hoping her parents, and Loki's parents, will change their mind. Tatiana shook.

"It has to be you," she said, "There's nobody else. We don't have much time and we can't find any other candidates…,"

"We don't have any choices, Mom?" asked Natasha, astonished, "Can't you just hand me to Maria's parents? And I think Loki can be transferred to…Clint's house?"

Clint Barton was Loki's best friend who was also Maria's distant cousin. Natasha knew him quite well because they had always been classmates, but she rarely reached him for he was always being around Loki.

"We can't bother Mr and Mrs. Hill. You can sometimes stay overnight at Maria's place, but it can't be every day. Especially after you marry Loki, you have to spend more time at home," Tatiana explained. Natasha shook many times, almost crying.

"I don't want to!"

"Natasha, please," Tatiana reached her daughter's hands and begged, "Two years. Only two years, and when we're home, you can do whatever you like. But for now, please marry Loki. Please don't make us any more worry while we work in England, far from you."

Finding her mother begged very sincerely, Natasha started to melt. She remembered that all her life she has always been given freedom by her parents. She can do whatever she wants, study in any school she likes, learn everything she is curious about, and dream of anything she wants to have. She always got Tatiana's and Ivan's backs, never on her single step her parents disapproved her.

And this time, only this time, she was requested one thing by her dear parents, which was all for her sake, because her parents felt highly uneasy to leave her alone.

But why should it be Loki?

"You promise?" she asked, "Only two years, and then I'll be free?"

"As free as birds, Baby," sweared Tatiana.

"Are you sure Mr and Mrs. Laufeyson okay with this issue?"

"Freya likes you a lot, don't you know?" replied Tatiana, "She glanced at you when she attended PTA meeting, and she thinks you're a beautiful smart girl that fits for her son."

"Eew," Natasha shuddered, "But it's surprising that Mrs. Freya likes me. I mean she is a perfect woman, I could not even find confidence to greet her last night."

The next day, at school, Loki blocked Natasha's way at the classroom door. Natasha sighed deeply.

"Get off," she said. Loki looked around before he bent down to speak before Natasha's left ear.

"You disapprove the wedding plan, no?" he whispered.

"I approved," replied Natasha. Loki stepped back, his face turned paler as if he played a leading role in the scariest horror movie ever.

"Wha-what the heck? What the heck is in your bloody mind, Romanova?!" he nearly screamed, makes the whole class look to the door.

"To obey my parents' order," replied Natasha calmly.

"OH MY GOD! OH MY GOD, NOOO~!" Loki screamed and fell on his knees, holding his head that seemed to explode. Everyone in the class ran after him. Natasha sighed before she bent down before him.

"You. Are. Very. Fuzzy. Fuzzy Pussy," she said intensely, then off to her desk.

Summer had arrived. Natasha held Ivan's left arm after leaving the bride dressing room. It was a bright Saturday morning, and they were at The Riverside Church, Manhattan, in order for Natasha and Loki to tie the knot. Ivan smiled widely to her daughter after watching her from head to toe.

"You are amazing, Baby," he praised, "I feel like not handing you to Odin's son."

"Then, don't," replied Natasha, still hoping for the last chance that her father would change his mind. Ivan shook.

"Someone should take care of you here," he said. Natasha sighed.

"Come on, smile," said Ivan, "Frown doesn't suit your pretty dress."

Natasha forced her smile. She was wearing a Marie wedding dress by Vera Wang, a new spring collection, which was Freya's choice. She refused at first, due to the high price and fact that she was still a high school student, not to mention that she would divorce Loki after two years. But Freya insisted and she told Natasha not to worry about the price. Tatiana even supported her, left Natasha with no choices unless to agree.

Ivan smiled at Natasha, convincing her that everything will be alright. Natasha started to smile. Deep inside her heart, she was very happy to wear such an amazing dress. Her red curly hair was styled into one messy bun, decorated with a big black rose, which matched the black top of her dress, on its right side. An Aria necklace by Tiffany & Co hang beautifully on her neck, matched the white skirt of her dress. She never felt more perfect in her lifetime. Although it seemed too early for her to have such a perfect appearance since she was still 17 years old, she admitted that the feelings worth it.

They walked down the aisle. Tatiana stood off her bench, so did Odin and Freya. Maria, the bridesmaid, and Clint, the best man, who seemed to be the only friends who know about this wedding, stood near the chapel with dropped jaws. Finding his friends acted differently, Loki, who stood facing the chapel, began curious so that he turned around. He and everyone were mesmerized of what they see. Morning sunshine came through the glass window of the church, shining on the walking bride. Natasha seemed to be more beautiful than they ever expected.

Loki took off his eyeglasses and rubbed his eyes. Never in his high school years, he found how his rival and enemy that he always claimed as barbarian and unladylike, turned into a fairy tale princess like now.

Natasha looked straight at Loki while walking to his side. She silently gasped. Waldorf Wool-Jacquard tuxedo by Brioni fit perfectly on Loki's tall slim posture. Instead of bow tie, he wore a dark emerald necktie that perfectly suits his dark emerald eyes. His black hair was styled very tidily with some gel, matched his typical nerdy look.

"Not bad," whispered Loki mischievously.

"I heard it as 'more beautiful than any Disney princesses ever'," whispered Natasha. Loki winced. The priest stood before them, stopped them from quarrelling. He gave some speech before entering the vows.

"Do you, Loki Bartholomew Laufeyson, take Natasha Alianovna Romanova, as your wife, to respect her in her successes and in her failures, to care for her in sickness and in health, to nurture her, and to grow with her throughout the seasons of life?"

"I do," replied Loki quickly, doubtlessly, surprising Natasha a bit.

"Do you, Natasha Alianovna Romanova, take Loki Bartholomew Laufeyson, as your husband, to respect him in his successes and in his failures, to care for him in sickness and in health, to nurture him, and to grow with him throughout the seasons of life?"

Natasha remained silent. The vow questioned to her by the priest moved her heart. She did not have not enough heart to tell a lie using all those sincere words. Furthermore she knew that she and Loki would end the marriage after two years, and that they would never reach any seasons of life.

"Natasha?" asked the priest. Natasha was startled.

"A…uh, yeah," she replied, "I do. I…do."

Afterwards, Loki put an Etoile ring by Tiffany & Co on Natasha's finger. And so did Natasha to Loki.

"Now I hereby pronounce you two as husband and wife," said the priest, then he looked at Loki, "You may kiss the bride."

Both Natasha and Loki wew shocked. They shook.

"Uh…that…Sir, I think it's…really private, so…," said Loki at loss. The priest raised his eyebrow.

"This is your wedding, you are officially her husband, what's the matter?" he asked suspiciously. Natasha looked at both her parents and Loki's parents and they seemed to wait for the kiss happily. She looked behind, and saw Maria also seemed to wait curiously. She looked across, Clint reacted the same.

"Sir, I think we…,"

Before Loki finished his sentence, Natasha grabbed his collar until he bent close to her face, then she quickly pressed her lips to his.

"Wha…,"

"I can't stand in this chapel forever. Can you?" asked Natasha mischievously, before Loki ever finished his question. The parents, Maria, and Clint clapped their hands together, ignoring Loki's pale face after that shocking kiss.

"Congratulations, Buddy!" said Clint with a big smirk that teased Loki.

"I won't let her over control," whispered Loki.

"Whatever, you two fit perfectly. May you two have a happy marriage ever after!" Clint yelled, and all the parents cheered. Loki glared at his best friend, saying "I-will-kill-you" with his eyes that makes Clint giggle.

They all walked through the church door, and a few classmates were already there, clapping their hands cheerfully. There were also some teachers, including Mr. Coulson, and SHIELD headmaster Nick Fury, a black grumpy man wearing an eye patch on his left eye. He is a former U.S army, who has lead SHIELD High School with high discipline since some years before Natasha and Loki entered.

"Congratulations, Natasha and Loki!" all the classmates yelled cheerfully. Meantime, both Natasha and Loki were still shocked of what they see.

"Uh…Mom, when did we agree to invite friends and teachers?" asked Natasha.

"Dad, I thought Clint and Maria are the only friends who know?" asked Loki. All the parents smiled at them.

"This is a happy day!" replied Tatiana, "We first want to invite everyone in SHIELD, but looks like it will be too much, so we only have some close friends and some teachers."

"Its' not bad to have your headmaster here, right?" said Odin, "We are much honored that you attend, Mr. Fury."

"No, Mr. Laufeyson, it's me who feels so honored. Please leave your kids to me and all SHIELD teachers, we will make sure we guide them until they attend their dream schools after graduation," replied Mr. Fury before he glared to Natasha and Loki, his two most mischievous students who were sent to his office by teachers nearly every day because of their noisy quarrels. Natasha and Loki, again, were shocked listening to all those spoken words. The unwanted wedding was finally known by everyone in SHIELD. Not yet everyone but surely everyone would, soon, yet their headmaster kept his eyes closer on them.

Their lives would never be the same again.