Author: Huzzah! The full Chapter One for the story! 95% of this is actually 'Let's Get Married!' as I thought it would be a cute one-shot between Arthur and Gwen, but this story would be delving deeper into Gwen's character, and what might be her purpose and possible connection to the Seven Deadly Sins. Who knows, she might end up being one of the Ten Commandments. Or Merlin's arch enemy, Madam Mim (from the Arthurian legend). Or just a simple queen-to-be.

I do not own Nanatsu no Taizai or any of the characters from the anime/manga. Kudos to Nakaba-san! *two thumbs up*

The kingdom of Camelot sprawled before a pair of blue eyes, as people of all ranks and life status ventured down the streets and lived another peaceful day. Guinevere pressed a palm against the glass of the window, barely sweeping away the velvet fabric of the curtain that was on the way of the view, as she lifted her head to gaze at the tall walls of the kingdom's borders, attempting to see the vast lands past those tall structures. Green fields spread throughout to the horizon, decorated with blooming flowers that could not be distinguished from such a distance. Despite the new king's young age, he had proven himself worthy of the position, slowly bringing back the kingdom's lost glory after the death of Uther Pendragon.

Everything was back to the way it was. Liones, along with the rest of Britannia, was saved from the possibility of being conquered and ruled by a corrupt Great Holy Knight as Hendrickson, who was said to have plotted the death of one of Liones' Great Holy Knight, and was the person behind the framing of the Seven Deadly Sins for such crime. Peace and order had returned to the entire land. Words of the Seven Deadly Sins' great acts of good spread within only days, and from fugitives, they became heroes. Perhaps they weren't seven brutal criminals. They risked their lives for the kingdom despite of the sin blamed on them.

"I'm glad you're awake," a cheerful voice echoed throughout the rather silent room, and Guinevere, who had been staring blankly at the large glass window before her, finally shifted her attention towards the door, where the voice came from.

"Ah, Lord Arthur," replied the young lady, a smile appearing on her lips.

The king was dressed in a light armor - a platinum chest plate adorning his torso, with the symbol of a dragon, the very symbol of the kingdom, gauntlets on his both hands and knee plates hugging the top end of his boots. On his waist was a sword Guinevere was so familiar with: Excalibur, the sword he himself pulled from the stone it long nestled on. Other than those armors, he wore a simple brown shirt that had been torn off its sleeves, and pants that hugged his lower figure. "Breakfast is to be served soon. Will you be my consort to the banquet room?" He even bowed, that same grin never leaving his face.

"As lively as ever, Lord Arthur," she replied, leaving the picturesque view from the window and taking her steps towards the man. "However, shouldn't you get dressed in your royal robes before we proceed to the banquet room? It would be uncomfortable as it would be unfitting to have breakfast in an armor."

He flashed her a grin, before doing as what she had suggested. Although, once he was finished taking off those metal scraps and was about to run over to the banquet room, Arthur found Guinevere standing on the same spot where he had left her. "Were you waiting for me?"

"You asked me to be your consort, and I haven't really given an answer, have I?" Which eventually led Arthur to offer a hand, and she took it, before they walked side by side to where breakfast was served.

"I haven't seen Merlin since yesterday, Lord Arthur," said Guinevere, as they ate. "It's... surprising." Indeed it was, as the sorceress was the king's advisor, and was considered as the greatest magician in all of Britannia.

"She said she'll be away for a while," the king answered. "Probably to reunite with the other Seven Deadly Sins."

That she didn't understand though. With Liones saved and Hendrickson gone for good, why would Merlin still need to accompany the Sins, the greatest knights of Liones, if here is Arthur, a king who is in need of a person to help him at such a young age? Unless she wished to stop being of service to Camelot and instead regroup with the Sins and be free beings.

Arthur paused at his meal and studied the princess for a while, noticing her sudden gloom upon hearing the news. Gently, he placed his hand above hers and grinned, "Are you worried that I might do stupid things while my royal advisor and magician is away?" He wished to add up something like he had her anyway but her next words cause him to freeze.

"Lord Arthur, a great terror is to befall upon Camelot."

She shared the same worry as he had, his fingers turning cold upon having the statement register on his head. "W-What...? What exactly does it mean?"

Guinevere shrugged and took back her hand. "I... I'm afraid I have not even the slightest idea of the vision I had, my lord. That's why I wish to have a word with Merlin about it." As a new king, she knew how much of a hurdle this is to Arthur, as that such events are large-scale problems involving the entire kingdom. It was her turn to envelope his sweating hand in hers, and smiled, "I'll be right here, Lord Arthur."

Yesterday had been a terrible day for Guinevere. She didn't know why exactly but a heavy weight had been residing in her chest since a certain time yesterday. Although she worries for Cameliard as well, the vision she had last night clearly meant one thing: Camelot is at great risk.

Father, I am extremely bothered by a terrible dream. In my dream, ten demons rose from the ground and tore apart the map of Camelot. They were laughing like the evil beasts they were, and afterwards continued to tear Britannia piece by piece. It's absolutely terrifying that I couldn't help but worry for both Camelot and our kingdom. Please, be careful.

Love, Guinevere

Carefully, she rolled the piece of paper to a scroll, handing it over to Great Holy Knight Lancelot along with the order that it be taken to King Leodegrance of Cameliard. The knight immediately complied, along with a promise that the king of said kingdom will receive the letter as soon as possible.

The rest of the day, Arthur was restless. He was conferring with the Knights of the Round Table, his own group of the best Holy Knights of the kingdom. They discussed of the acts to take once an attack happens, or any being from somewhere decides to simply crash down and say hello. At that moment, Guinevere regretted the decision of telling him the premonition. It obviously stressed the king out, which bothered to an immeasurable extent. She should have discussed it with the sins instead, seeing that revealing the problem to him without Merlin by his side was indeed one thing he was never used to.

A voice cut through her train of thoughts and she looked up to see the young man. "Gwen, what are you doing here?" He had caught her standing outside the door of the meeting room, and as the knights descended from the room, Guinevere knew the discussion was already over. She waved at the Holy Knights that bowed respect before finally taking their leave, and Arthur helped the princess into the room.

"I was... worried for you, my lord," she admitted. "Please do not stress yourself out. The kingdom would not want you getting sick, Your Majesty."

He took her hand and pressed it lightly against his cheek. "As long as you are here to take care of me, I will be fine, Guinevere." And he kissed her hand before releasing it, still smiling brightly. How this demeanor of his could hide the obvious tired look from his face, Guinevere didn't now. Arthur was always cheerful, even after what cruelty happened to him in the past. "I'm free now. Do you wish to take a run around the kingdom?" His smile became a mischievous grin, and she immediately knew what his words meant. It was a literal run. The one thing they never fail to do whenever his royal duties do not take much of his time.

They chased each other in the kingdom like little kids, checking out the stalls and having fun conversations with his subjects. Each was happy to express how much they appreciate the young king's efforts in taking care of the kingdom, and even her support to a kingdom that was foreign to her. Guinevere watched as Arthur wholeheartedly spoke to his people, as if he wasn't king at all, but one of them. He was not a king who looked so low at his subjects. But as she was sitting on a barrel while watching, a glowing sphere appeared before her and suddenly popped, revealing a rolled piece of paper that landed on her lap. Knowing perfectly who would be so great to send a message through magic instead of the usual means, she wondered what could be written in that paper. Carefully, she unrolled it and silently read the message.

We're coming over to Camelot~

Merlin

"What is that?" She was surprised to find him bending down to her eye level, that infamous grin of his never leaving his face. "Is that from Merlin?" She nodded and smiled, handing the piece of paper over and allowing him to read the message himself.

Upon their return to the castle, both of them moved to change to a better set of clothes. Arthur walked out of his room wearing a blue robe of silk lined with gold and having a belt looped around his waist. The crest of Camelot was embroidered on the right chest portion of his clothing. His pants were of a lighter shade, tucked inside brown boots that reached below his knee. A long white scarf-cape brushed against the floor as he walked. Guinevere, on the other hand, was dressed in a gown of yellow, with the embroidery of Cameliard's crest, roses present on her head to serve as accessories instead of a bright and glistening tiara. They had agreed to meet the Seven Deadly Sins on the conference hall.

But as Arthur escorted her to said room, a question slipped past his lips out of blue. "Gwen... When I turn seventeen, let's get married right away."

"W-Wait- Right away-?!" A rosy coloration spread across her cheeks and she stared at the young king in surprise.

He flashed her a grin. "Indeed! King Leodegrance has already given his approval, and even sent the Round Table as dowry. We wouldn't be having any trouble, would we?"

"N-No, Your Majesty, but..." Even though her father had agreed at such arrangement without even any second thought, planning a wedding nearly a year ahead is simply too much, even for a king. But Guinevere could not find the proper words to reason out, as she fumbled over various words, none befitting to be used to answer Arthur at that moment.

"Right away then!" His grin never faded. "And then we could go being less awkward with each other and sleeping in one bed-"

"My Lord!" She cried as they entered the hall. "The entire castle could hear you!"

Arthur glanced at the maids filed on the sides, and gestured at them to leave the room at once. "Well, it is what will happen-"

"- I am pretty much knowledgeable of that, My lord, but don't you think you are a bit too advanced to think of such? There are still things that could happen in the remaining months that should be given more attention to."

"Am I?" The king thought for a while, a frown now adorning his face which quickly twisted to a smile of hope. "But we will get married right away, wouldn't we? Just imagine Camelot and Cameliard celebrating in pure joy!"

Oh dear, poor Guinevere thought to herself. Once he starts it, he never stops. With a sigh, she told him, "Your Majesty, there is no way a wedding could be done in such thing as 'right away.' There are preparations to be made, like the measuring for the wedding clothes, and notifying the people, informing the church, preparing the reception venue, and -"

The young princess never had the chance to finish her rather long statement as a pair of lips crashed against hers. It was only an 'umpf!' that she could manage, unable to do anything at all with Arthur grabbing both her wrists. She only found herself dwelling into the sensation until the sound of doors being kicked open and a familiar voice came to her ears: "Oh, are we interrupting something?"

As quick as he had kissed her, Arthur pulled back, faking a small cough and taking a seat on one end of the table. Guinevere, on the other hand, was too red to even say a single word. From the door, there came the image of Merlin, Meliodas, Diane, Princess Elizabeth of Liones, and a person Guinevere had never heard nor seen. "My, my. It appears we really are, Captain," said Merlin, pulling the chair closest to Arthur on one side of the table and taking a seat. "Were you in the midst of discussing something important?"

"We were talking about what we'll do after getting married."

"Oh," the sorceress replied, her lips pursing to a teasing smirk she threw over to Guinevere, who was obviously smoking after an embarrassing scene their visitors had caught her in. "How wonderful."

Meliodas, who had sat a few seats from Merlin, finally spoke, "It really would have been better if you dressed in armor than robes. A demon could come attacking Camelot any minute now." Just as when he had said that, an eruption exploded somewhere south of the kingdom, causing all of them to rise from their seats and see what was that. Smoke was rising from the ground, but was too thick to help them recognize the summoned invader. Meliodas and Merlin rushed out of the castle, with Diane and Elizabeth with them. "Gwen, stay here, where it's safe," was what Arthur told her before leaving for his armor.

Guinevere felt so helpless as she could only watch from the balcony, seeing the large creature being fought. Her every attempt of leaving the castle was foiled by Sir Lancelot or any of the Knights of Round. Explosions occurred anywhere close by, and the more of them she sees, the more the worry in her chest grows. From that distance, she knew that the being was a demon, and could destroy Camelot if not for the help of the Seven Deadly Sins. However, from the distance, she could not figure out the conditions of those fighting the demon. It was Meliodas for sure, and it was a given that it was a skilled fighter, but still... That worry disappeared in thin air though, after seeing that the monster was destroyed. But she was soon struck by a heavy feeling, an overwhelming amount of power registering to her senses. Quickly, she left the balcony.

The monster was only an appetizer.