AN: After much googling, I learned that although Halloween isn't really celebrated in France, it's becoming more popular for various reasons. So although trick or treating isn't common there, it's not unheard of so I kind of rolled with this. I just wanted the gang in costumes tbh. Also, the voice actress for Marinette in the English dub also voices Rei Hino in Sailor Moon. It'll make sense, trust me.

"Boys! Hurry up, we're going to be late for trick or treating!"

Alya knocked firmly on the door to Adrien and Nino's dorm, one hand on her hip as she looked over her shoulder at Marinette. The other girl simply shrugged, opening her scarlet handbag as she gave Alya a sympathetic smile.

"I mean, we still have time," Marinette said, looking at the phone she'd pulled from her bag. "Your sisters aren't expecting us for another forty-five minutes…"

"True, but we're walking in heels. We need the extra time to get there," Alya noted. She knocked on the door again. "Nino! Adrien! Come on, even Marinette is here on time!"

"Hey!" Marinette exclaimed.

"Am I wrong?"

"… No."

Alya smiled, moving away from the door to quickly hug her friend. "Marinette, I adore you, but you aren't exactly the best at being on time. Although right now the boys are threatening to steal your title as Tardiness Queen."

Marinette smirked. "Will they have to share the crown, or do they get one each?" she laughed.

"Oh, they have to share."

The movement of the door handle stopped the girls' conversation, and both of their mouths dropped as Nino stepped out, fully decked out in 18th-century clothes. The white pants and long blue jacket didn't seem too over the top, but he'd added a ruffled shirt for full effect. It was impressive, to say the least.

"Sorry to keep you waiting, ladies- hooooly hell, those are short skirts. Good Lord, you two look good!" Nino sputtered as he took one glance at the costumed girls at his door, blinking rapidly.

"Aren't they great?" Alya grinned at his reaction, twirling. "Marinette made them! My sisters wanted to be the Sailor Senshi – there's enough of us to make up the majority of them – so Marinette and I are Sailor Mars-" Marinette placed her hands on her hips and raised her chin, smirking in a way eerily similar to the cartoon guardian of Mars "-and Sailor Venus!" Alya gave her boyfriend a peace sign, tossing her hair back and winking.

Nino nodded slowly, taking in the bright skirts and golden tiaras that adorned Alya and Marinette.

"Was there a reason you two got those characters? 'Cause Mari doesn't exactly remind me of Sailor Mars, to be honest."

"Alya's sisters chose their favourites, and of the remaining Sailor moon characters, these were the ones we liked best," Marinette explained.

"Besides, yellow and orange look great on me, and we all know red is Marinette's colour!" Alya added. "Plus, Mari does the best Sailor Mars impressions."

Nino nodded slowly.

"Well, Adrien is about to cry from happiness. Why are all the people I love such nerds?" Nino sighed, before giving Marinette a grin to show that he was joking. Alya rolled her eyes, stepping towards Nino to wrap her arms around his shoulders.

"It's because you're one of us, babe, like it or not. Otherwise you wouldn't have dressed as Hamilton."

"Hey, Hamilton is cool now. The music is a revelation, and-"

"Please don't start rapping at my siblings later."

"… Fine."

"Anyway," Marinette chimed in, interrupting the duo as Alya gave a pouting Nino a peck on the cheek in thanks, "it's good to see that we went all out for Halloween! You guys excited?"

They both nodded, Nino's arm sliding around Alya's waist as she turned to face Marinette.

"Definitely!" Nino exclaimed. "Tonight will be fun – trick or treating, then a party? Heaven!"

Alya bumped her hip against Nino's, smiling warmly. "You're going to be on a sugar rush in about an hour, aren't you?"

"Almost definitely."

Marinette's eyes flicked from her two friends to the empty doorway, a small crease forming on her forehead as she frowned slightly.

"Is Adrien okay?" she ased, gesturing to the empty room. "He's taking a while."

Nino's hand moved to the back of his neck as he bit back a laugh. "He's fine. He's just, uh, putting the final touches on his costume." Nino grinned. "You think we went all out? Wait until you see his outfit."

Alya's eyes widened. "It's child-friendly, right?"

"It's Adrien, of course it's child friendly," Nino scoffed. "Your oldest sister is going to love it." His eyes snapped to Alya's skirt, a look of concern growing on his face. "Actually, speaking of child friendly – you said your sisters were also going as sailor senshi…?"

"Relax, Nino. Their skirts are a lot longer, over the knees," Marinette assured him. "I just did ours to the thigh so that we could use them for other costume parties if we wanted to. Besides," Marinette lifted her skirt up the tiniest amount to reveal the bright red shorts she wore, "everyone has a pair of these underneath - in case of wind."

Alya gave her friend a thumbs up. "She thinks of everything," Alya said, leaning against Nino as she folded her arms.

"Sorry I'm late, guys!" Adrien's voice echoed through the room, causing three heads to turn to the doorway. "I'm nearly – yep, I'm done!"

The first thing they all saw was the jumpsuit. Bright orange, it practically blinded them with its garish colour. Marinette was the first to look away, her eyes trailing up to see the whiskers drawn on Adrien's face, and the dark blue headband with a silver band attached to it.

A few long seconds passed before anyone could speak.

"I mean, it's certainly child-friendly," Alya said, blinking. "But my sister won't leave your side for the entire night, Adrien, I'm warning you now. She loves Naruto."

Adrien breathed a sigh of relief as he walked towards his friends. "I'm so glad you know who I'm meant to be, I was worried that it was too vague."

Nino patted him on the shoulder when Adrien reached him.

"Adrien, everyone will know who you are. Believe it."

Everyone looked at Nino with disappointment in their eyes.

"What?" he protested. "He's dressed as Naruto, you all knew that was coming!"

"Anyway," Adrien said, "you all look amazing! I love the sailor senshi costumes – although I'd never have put you as Mars, Mari."

"I get that a lot," she replied with a grin. "You look awesome, where did you get the costume?"

A blush appeared under the hand-drawn whiskers on Adrien's face. "I might have called in a favour with a costume designer my dad works with. I may not be allowed to let anyone know that they made it, on pain of death."

Marinette laughed. "Your secret is safe with us."

"I wish I'd known there was a Sailor Moon theme though, I would have come as Tuxedo Mask!" Adrien said, a note of regret lingering in his voce. Alya shook her head.

"No, this is better. Otherwise you'd have all of the younger Cesaire sisters following you like ducklings. At least this way only one of my sisters will be obsessed with you. "Alya pinched the bridge of her nose. "Besides, I can only deal with one person being obsessed with Adrien Agreste at a time."

"Huh?"

Alya's eyes widened as she realised what she'd said. "What? Nothing. Now, are we going, or are my sisters taking themselves trick or treating?"

Alya grabbed Nino's hand and started pulling him towards the end of the corridor where the exit was. Marinette, eyes wide, glanced over at a bemused Adrien, who shrugged when she met his gaze.

"I think I misheard something," he said, his hand rubbing the back of his neck. "Oh well! Shall we follow them?"

Marinette nodded, taking a step back so Adrien could walk through the doorway and lock it behind him. As he shoved his keys into one of the many pockets of his jumpsuit, his eyes skidded over Marinette's costume.

"You know, I've met people who would pay through their nose for cosplay that good. Where did you get it?" he asked, beginning to move in the direction Nino and Alya had walked in. Marinette's cheeks flushed a soft pink, and she gave him a little smile of pride. Something clicked in Adrien's mind, and his mouth dropped open. "You made it? Marinette, you never cease to amaze me."

"Thanks," she said, straightening her shoulders as her smile grew. She looked over at Adrien, and raised one eyebrow.

"So, Tuxedo mask, huh?"

Adrien rolled his eyes. "What? I thought he was cool, okay?"

"It's okay – so did I," Marinette said, nudging Adrien with her elbow. "Just don't tell Alya, she thinks he's useless."

"Well, he was, but still. He was a cool superhero." Adrien paused. "Kind of made me want to be one, you know?"

Marinette gestured to her outfit. "Yeah, I know what you mean," she laughed. Her bright smile faded a little though, and Adrien frowned as Marinette looked down at the ground before glancing back up at him. "Although, I've got to say, being a superhero doesn't seem that fun. Lots of pain involved. You lose people." Her eyes widened, and she let out a false laugh. "I mean, look at Tuxedo Mask! He gets kidnapped a lot. And dies. A lot. A concerning amount, really."

"Very true," Adrien conceded. "But he always came back."

Marinette nodded thoughtfully. "Yeah. Yeah, I guess he did." She shook her head, batting away whatever thoughts had wiped the smile off her face.

Adrien nudged her, mimicking Marinette's action from moments before. Her head snapped around to look at him, and he gestured to the corridor behind them, grinning. "So me quickly changing into a tuxedo for tonight-"

"Would be a bad idea." Marinette paused. "Well, actually it would be a great idea, but Alya may kill you, and all her sisters would propose to you on the spot."

"… I think I'll stick to Naruto."

"Wise move."

They were rapidly approaching the exit to the building, where Alya and Nino were waiting. Once the couple saw Adrien and Marinette approaching, Alya swung the door open and held it for them.

"Guys, hurry up!" Alya called to them. "Mama just texted saying that the little devils have started eating sweets already, and I'm not dealing with a bunch of sugar crazed sailor senshi!"

"Okay, okay!" Marinette laughed at the look of pure distress on her friend's face. "Don't worry – between Sailor Mars, Sailor Venus, Hamilton, and Naruto, I think we can deal with your sisters!" Marinette blinked. "There's a sentence I never thought I'd say."

Adrien patted her on the shoulder.

"That's Halloween for you."