The hotel room was a mess. So was Yuna.
Makoto watched her sprawled on the sheets, looking completely wrecked, and felt a strange mix of guilt and tenderness. He was the one who'd pushed her this far.
It was only fair that he put her back together.
"Alright, alright," he murmured. "Such a possessive little sister."
He walked into the bathroom and turned on the tap, filling the ridiculous heart-shaped tub. Steam started to cloud the room. "Bath time?"
Yuna's glare softened into a reluctant smirk. "Took you long enough," she muttered. She slid out of bed, the stained satin sheets pooling at her feet.
She swayed a bit, her body a map of his bites and hickeys. "...Carry me," she demanded, her voice a soft, tired whine.
All the usual bratty fire was gone. "My legs still feel like jelly, you fucking animal."
He scooped her up easily. She was light in his arms. She wrapped her own arms around his neck and rested her head on his shoulder with a sigh.
"...And don't even think about trying anything in the tub," she mumbled into his skin. "I'm too sore."
The way she nuzzled against his neck told a different story.
"I like it when you cling to me like this," he chuckled, lowering her into the warm water. He tossed in a bath bomb, and the water turned a swirling purple.
He took a sponge and started to gently wash her back. "I don't think I could ever get tired of this."
Yuna melted with a sigh that was half pleasure, half exhaustion. Her head lolled against his shoulder as he carefully scrubbed her clean.
"...Shut up," she mumbled, but there was no bite to it. Her fingers traced lazy patterns on his wet skin. "You're just saying that so I'll let you fuck me again later."
She leaned back, her eyes fluttering shut. "...But you're right," she admitted in a raw whisper. "I can't get enough of you either, you disgusting pig."
Her hand drifted down through the purple water, her fingers brushing against his softening cock. "...Maybe just one more round," she purred. "For the road."
Makoto yawned, a deep exhaustion finally hitting him. "Horny again already?" he teased, rubbing his now-limp cock against her hand. "Give me a break. I'm completely drained after last night."
She let out a weak, breathy laugh. "Useless," she murmured, but her hand closed around him gently. "I guess I'll have to do all the work, as usual."
She shifted, her wet ass pressing against his stomach. "...Don't worry," she whispered, her voice a low, husky purr. "I know how to get you started."
Her thumb brushed over his tip. "...And if that doesn't work," she added, her eyes glinting with that familiar wicked look,
"I'll just have to use my mouth." She leaned in, her breath hot on his ear. "...But you'll owe me extra gacha pulls for this. Lots of them."
Hours later, the daylight felt way too bright as they left the hotel.
Yuna looked like she'd been through a war. The Ganyu cosplay was a forgotten memory, replaced by an oversized hoodie and shorts that didn't quite hide the fresh hickeys on her neck.
A comfortable, tired silence settled between them as they walked.
Makoto yawned and stretched. "Well," he said, a teasing glint in his eye.
"It's Saturday. That means it's time for the weekend girlfriend experience." He chuckled, looking at her. "So, how are my girlfriend's studies going?"
Yuna groaned. "Ugh. Is this the boring boyfriend part?" she grumbled, but her fingers found his and laced together easily. "Fine. Way less exhausting than last night, at least."
She leaned against him with a sigh. "Oh, by the way," she said into his shirt. "My friend Mika is coming over to 'study' later."
She pulled back just enough to glare up at him. "She keeps asking about my cool, mysterious older brother."
Yuna's grip on his hand tightened. "So you better not act all charming and shit while she's here."
Her smile turned dangerously sweet. She rose on her tiptoes and bit his chin. "Unless you want me to tell her exactly what kind of 'studying' we were doing all night."
She skipped ahead, pulling him along. "Now carry my bags, boyfriend. Your girlfriend is tired."
Makoto just shrugged, a fond smile on his face. "I bet she can guess what we did, especially with those hickeys."
Yuna snatched a takoyaki. "Why would I cover them up?" she said, her mouth full.
She deliberately pulled her collar down, showing off the darkest bruise. "It's good to mark your territory."
He took her bag and stopped at a street vendor for some takoyaki. "So, this Mika girl. How does she even know about me?"
She chewed for a moment. "She saw a picture of us," she finally admitted. "From last year's family beach trip. You know, the one where you look like a fat, sunburnt seal."
Her grin was pure evil. "She thinks you're mature and dependable."
Yuna shuddered dramatically. "I told her you still sleep with a stained anime body pillow."
She nudged his foot with hers. "She's coming over at three. And if you so much as offer her a drink," her voice dropped to a dangerous whisper, "I'll 'accidentally' spill hot coffee on her laptop. And on your crotch."
"Hey, that hurts," he grumbled, wiping a bit of sauce from her lips with his thumb. "I don't have any anime body pillows."
"Unless you count the Dodoco plushie you stained." He patted her head. "So, what should I say if she asks if I'm single?"
Yuna froze mid-chew, her eyes wide with a mix of fury and panic. She slapped his hand away. "You'll tell her you're taken, obviously," she hissed. "By a psycho bitch who will key her car if she looks at you for too long."
She shoved the rest of the takoyaki into his mouth to shut him up. "And if she asks who," Yuna leaned in close, "you'll describe me. The cute, possessive one. Not the Ganyu-cosplaying, incestuous one."
Her nails dug into his arm. "And for the record," she whispered, "the Dodoco plushie doesn't count. But if you want a Yuna body pillow... that's a custom order. And it's very, very expensive."
"Why would I want a Yuna body pillow when I've got the real thing to use every night?" he shrugged, gripping her hand.
"Let's go get some groceries, okay? I'll clean up and cook you lunch."
Yuna's face went bright red. She yanked her hand free and stomped toward the supermarket. "S-Shut up! Don't say lewd shit like that in public!"
When he caught up, she didn't pull away. Her hand found his again, a silent, possessive claim.
"...Fine," she muttered, looking away. "Lunch is acceptable."
Inside the store, she was back to her usual self, loading their cart with junk food. "This is for Mika," she explained, her face a mask of innocence. "For studying."
But when she thought he wasn't looking, she snuck his favorite brand of coffee into the cart.
"...It was on sale," she mumbled when she saw him watching, her ears turning red. "Idiot."
Just as they were about to check out, she stopped in the baking aisle.
"...Mika likes cheesecake," she said, her voice flat. She tossed cream cheese and graham crackers into the cart. "You should make one for her."
Her eyes met his in a silent, dangerous challenge. "You should show her what a great, attentive... brother you are."
The word sounded like poison.
He knew exactly what she was doing.
"Oh?" he purred. "Trying to show off how cool your brother is, but worried your friend might steal him? You're so cute when you're jealous."
He paid for the groceries, then leaned in and gave her a soft peck on the cheek.
Yuna jerked back like she'd been shocked. "I am not cute!" she hissed, her face on fire. "I am establishing dominance! Showing her what she can't have!"
She snatched the grocery bags. "And stop that! What if someone sees?" She glanced around nervously, all her usual confidence gone.
But as they walked home, she kept bumping her shoulder into his.
"...You better not burn the cheesecake," she muttered, so low he could barely hear. "I want some too."
Then, even quieter, a raw confession.
"...And don't you dare give her the bigger slice."