MMMS 101

Artoria looked down, her cheeks pink as she turned away from him.

"…!"

The evening gown she wore was pitch-black silk, with a zipper running from her hips all the way up her spine. Now that it was completely undone, her back was bare to the soft light. Smooth skin like porcelain, delicate shoulder blades, the gentle curve of her spine. All of it belonging to the King of Knights.

Ryuuto's breath caught in his throat. He just stood there, staring.

No wonder she'd looked so nervous when he offered to help with the zipper.

"S-Sorry…" she glanced over her shoulder when the silence stretched too long. "Is it too much?"

"Not at all." His voice came out rougher than he meant. "In fact… it's a feast for the eyes. Are you sure I'm allowed to see and appreciate this for free?"

Artoria's cheeks puffed out. "Please don't say weird things. This isn't something you should 'appreciate'…"

…

"Eh… Ryuuto?"

Morgan froze in the hallway when she spotted him up ahead. Her Master was standing outside a room, talking to someone inside. Arthur's room.

She almost kept walking. Almost. But then he stepped inside, and all she could think about was Irisviel's smug face from earlier. If Arthur came to her with that same bragging expression later… Morgan might actually snap.

She took a sharp breath and followed him. Outside the room, she paused, fingers curling around the doorknob—just for a second. Then she pressed her ear against the door instead.

…

Under the warm lighting, Artoria's bare back made him forget why he'd even come here in the first place.

"If you're done staring, Master…" she shifted slightly, goosebumps rising on her skin. "Can you zip me up now?"

"Ah—right! Of course." he grabbed the zipper and tugged. Nothing. It was completely stuck around her hips.

"…Master, am I… too fat?" With her back still turned, she lifted her hips slightly and peeked over her shoulder. "Is it because my waist is bigger than my sister's…?"

He stared at the curve of her waist, the way the dress clung to her. He shook his head.

"No, I don't think that's the problem…" More likely, it wasn't her waist at all. Those hips of hers were just too perfect for Morgan's dress.

"Lancer, can you… squeeze in a little?"

"Eh?"

"I mean, I think the issue is more with your hips than your stomach."

Her face went red. "Master, are you saying… my butt is too big?"

"What? No! I mean—" he panicked. "Yes? But not fat! Just... you know... you're curvy! In a really good way! Like, really good. Your sister's dress just wasn't made for someone with your... uh..."

"…No one asked you to rate my butt." She looked away, but he caught the tiny smile pulling at her lips.

"Got it. I'll... do my best."

"Okay." she took a deep breath. "I'm gonna suck it in now, so..."

She tensed up, and he could see her hips pull in slightly. The zipper loosened.

"Alright, here goes nothing."

"Mhm..."

He pulled the zipper up. This time it glided smoothly, sliding past her waist and climbing higher. She breathed out in relief.

"Oh thank god. Okay, I'm going to relax now—"

Rip.

"...Oh no."

"...Shit."

They both froze. Artoria's face went from pink to bright red as the reality hit her. Ryuuto looked down and winced. The dress had split completely from her waist down.

"............"

"............"

Dead silence.

"Um." Artoria's voice came out tiny. "Can you maybe... step outside? I need to change. Like, right now."

"Y-Yeah, definitely—" he started to turn away.

That's when he saw Morgan standing in the doorway, staring at them both like she wanted to set something on fire.

"What's wrong—" Artoria followed his gaze. “What’s wrong, Mast—wait, Sister!?”

Morgan's eyes flicked between Artoria's exposed back and Ryuuto's guilty face. "So. Mind telling me why you're both playing with someone else’s dress?”

In the end, both of them got kicked out of the room.

"Wait, Sister..." Artoria shifted nervously in the hallway. "How long were you standing there?"

Morgan's voice drifted through the door as she changed. "Since the moment Master told you to squeeze your ass."

"...Kill me now." Artoria buried her face in her hands.

A few minutes later, Morgan stepped out wearing the magically-repaired dress.

Ryuuto's jaw dropped. Artoria just stared.

The dress looked completely different on Morgan. It hugged her curves like it was designed for her. She was taller, making the knee-length hem ride up way higher than it should. Everything about her screamed confidence.

"Well?" Morgan put a hand on her hip, clearly enjoying their reactions. "How do I look?"

It took Ryuuto a moment to find his voice. "You look... incredible."

"Good answer." She smirked, obviously pleased but trying to play it cool.

"Actually, Caster..." he glanced at the other dress hanging nearby. "Would you mind trying that one on too? For comparison?"

"You're really pushing it, aren't you?" But Morgan was already reaching for Artoria's wrist. "Fine. But Arthur's coming with me."

"Eh?" Artoria blinked. "Why me?"

"Because." Morgan's smile turned a little wicked. "Master wants to see you try on dresses too, right? I'll help you pick something that actually fits this time."

Artoria blinked, then her expression softened. "Okay... I'll leave it to you, Sister."

With that, both sisters disappeared back into the room, leaving Ryuuto standing alone in the hallway.

"Now what?" He leaned against the wall, mind already wandering to very inappropriate places involving both sisters and various states of undress—

"Don't even think about it, Master." Morgan's voice came through the door, cutting his thoughts short.

“…”