The call was still live.
Aiko's pillow had been hurled somewhere across the room. Yuki sat frozen, wide-eyed, clutching his hoodie as if it could somehow protect him from what he'd just witnessed. And in the center of it all, Ai lay tangled in the blankets, naked and flushed, her older brother's hand sliding beneath the covers again like he owned every inch of her body—which he did.
"Shin…" she whimpered, voice barely a breath.
"Onii-chan," he corrected smoothly, his voice dipping just for her. "Say it properly, baby."
She bit her lip. Her legs shifted beneath the blanket, thighs rubbing together instinctively as she murmured the word, "Onii-chan…"
"Good girl," he praised, his tone thick with affection and heat as his fingers gently cupped her breast under the covers, thumb brushing across her nipple. Ai gasped, her breath catching as her hips twitched.
Aiko shrieked. "YOU'RE DOING IT RIGHT NOW!!"
Yuki looked like he might pass out.
"Sh-SHIN!! We're still on call, you know!!"
"Oh, I know." He tilted the phone back, holding it so his half-lidded gaze stared directly into their shocked and envious faces. "I just figured… you deserved to see what you're missing."
He shifted closer to Ai, who mewled as his other hand slid around her waist, gripping her possessively beneath the blanket. "Isn't that right, Ai?"
She trembled, cheeks burning. "T-They're watching…"
"They were watching earlier too," he reminded her with a husky chuckle. "You didn't complain then."
Her lips parted in a quiet moan when he gently squeezed her again, rolling her nipple between his fingers. Her body arched into him, the blanket slipping lower… lower…
"Let them see," he whispered, pulling the covers just enough to reveal the swell of her breasts—and the vivid red marks littering her skin.
Love bites.
Dozens of them.
Trailing down her neck, blooming over her collarbone, scattered across her breasts like a constellation of proof. There was no mistaking what they were. No mistaking who gave them to her.
Ai buried her face in Shin's shoulder, humiliated and secretly thrilled.
"N-No… this is too much, Onii-chan…"
Aiko's jaw had dropped. "There's no room left on her! Did you—did you seriously mark her everywhere?!"
"Everywhere," Shin confirmed, dragging his fingers down Ai's stomach beneath the blanket, making her whimper into his chest. "She asked for it. Didn't you, Ai?"
"I… I didn't mean all over…"
"You didn't say stop."
Her blush deepened. "That's not fair…"
He leaned in, kissing her cheek, then just below her jaw. "Neither is being this gorgeous."
Yuki was now redder than his hoodie. "I… I can't… I-I need water or something…"
Aiko fanned herself dramatically. "This is illegal! You can't just parade your sex life like this in front of us—especially when Ai's making those faces!! Look at her!! Look at those eyes!! That squirming!! I hate you both!!"
Shin's grin was slow and lazy. "You hate how much you want it."
Yuki clenched his fists. "D-Don't say it like that…"
He moved the phone again, angling it just so the girls could see more of Ai's upper body—her flushed, bite-marked skin, her tousled hair, her trembling lips as Shin's hand never stopped moving under the sheets.
"Onii-chan…" she moaned, pressing her thighs together.
The sound sent a visible shudder through Aiko.
"…Okay," she whispered. "Okay, you win. I'm dying. I need you. I'm literally vibrating."
"Same," Yuki admitted, voice low and strangled. "I can't stop staring. I should hang up. I should. But I can't…"
Ai peeked up at them, biting her lip, eyes glassy with desire and mischief. "Do you really think you can handle Onii-chan? Just watching makes you two fall apart…"
"Hey!!" Aiko snapped, indignant and flustered. "I can totally handle him!"
Yuki shook his head. "You'd pass out after five minutes."
"S-Shut up! You don't know!"
"I do know!"
Ai's smirk deepened. "Neither of you know what he's like when he doesn't hold back. You've never felt his fingers, or his tongue, or how he groans into your ear when he's—"
"A-Ai!!" both shouted at once.
She giggled and pulled the blanket slightly back up, as if to tease them more by hiding again. But Shin stopped her, pulling it down farther—this time past her waist.
"No hiding," he said firmly, voice velvet and heat. "Show them."
Ai gasped, reaching to cover herself, but Shin caught her wrist.
"O-Onii-chan… don't show them there!"
"I'm not showing everything," he soothed, angling the camera to reveal only what he wanted—the flush of her stomach, the curve of her hip, and more of the vivid, possessive love marks he'd left there.
Aiko's breath hitched audibly. "You did that… down there too…?"
"All the way down," Shin said, voice low. "She was begging for it."
Ai moaned softly, legs rubbing together again.
Yuki had his face in his hands. "Why am I still watching this…"
"Because you want to be her," Shin answered without hesitation.
Yuki's head snapped up. "N-No I—"
"Yes, you do."
"…Maybe a little…"
Aiko groaned. "Taa-Kun, you're such an evil tease. You know we want you, and you're making it worse!!"
"I want you too," he said, voice suddenly sincere. "Both of you."
Ai looked up at him, startled.
But Shin didn't waver.
"You think I'm just teasing, but I'm not. You're mine. All of you. I'll prove it every single day, to each of you. Starting tomorrow."
Yuki's eyes widened. "W-What do you mean?"
"I mean," Shin said with a wicked grin, "I'm going to ruin you. One at a time. Then all together."
Aiko's mouth opened. Closed. Opened again. "T-Taa-Kun…"
Ai gripped his arm. "Onii-chan… that's not fair…"
"Life isn't fair, baby," he whispered, kissing her temple. "But you love it."
She melted into him.
Aiko swallowed hard. "If you don't open the door the second the sun rises—"
"I'll leave it unlocked," he promised.
Yuki, pink-faced and trembling, whispered, "Save some marks for us…"
Shin's grin turned dark. "I won't."
---
Ai's breath hitched.
Shin's hand had never left her body, but now it drifted lower—fingers sliding past her belly, tracing the curve of her inner thigh under the blanket. Ai's thighs instinctively pressed together, but Shin gently eased them apart, his voice murmuring just beside her ear.
"Let me in, baby."
Her lips parted in a silent moan.
She could still see the glowing screen. Aiko and Yuki were watching, unable to tear their eyes away. And somehow… that made it hotter.
She whispered, "O-Onii-chan… they're still watching…"
"I know," he replied, utterly calm. "Let them."
His fingers dipped into the heat between her legs, parting her slick folds beneath the blanket. Ai's head fell back on his shoulder, her mouth open, eyes fluttering shut.
"Shh…" Shin whispered, kissing the side of her neck. "Be quiet for me. I want them to see, but I want them to listen even more."
She whimpered.
His fingers slid through her folds, deliberately slow, spreading her arousal, feeling just how wet she already was. Ai's body trembled.
"S-Stop teasing…"
"I'm not teasing," he murmured, his fingers gliding in a slow, rhythmic circle over her swollen clit. "I'm claiming you. Again."
Ai squirmed in his lap, the blanket shifting with her movements. Her hand flew to grip his wrist, but she didn't pull him away—she held him there, needing his touch, aching for more.
Aiko moaned through the call. "Oh my god, I can hear it…!"
Yuki's voice was shaking. "I-I can see her shaking…"
"She's beautiful, isn't she?" Shin said calmly, his fingers never pausing. "Even more when she's like this… soft, wet, open only for me."
Ai cried out softly, biting her hand to muffle the sound.
"Don't hide it," he whispered in her ear. "Let them hear how much you love this."
His fingers pressed deeper, slipping past her entrance just enough to make her arch her back. Ai choked out a moan, clinging to him, her body shivering under the blanket.
"G-God, Onii-chan…"
"There's my good girl," he whispered, curling his fingers inside her just a little. "Tight and warm… You're already clenching around nothing. Do you want more?"
She nodded desperately.
"Say it."
"I want more… please…"
Shin kissed her ear. "Spread your legs wider."
Trembling, Ai obeyed, parting her thighs as far as the blanket and her shame allowed. Shin slid his hand deeper beneath her, his fingers now fully exploring the slick heat of her pussy, curling and stroking inside her in slow, deliberate motions.
"Holy shit…" Aiko whispered from the screen, her breathing heavy. "He's… he's fingering her right there…"
Yuki was clutching his phone like a lifeline. "She's gonna break…"
Ai's whole body was tense, her breath ragged. "O-Onii-chan, I… I'm close…"
"I know," he said softly, his thumb returning to her clit, moving in gentle circles. "I feel it. You're so tight, baby. So needy."
She gasped, her hips lifting helplessly into his hand.
The wet, slick sound of his fingers moving inside her was unmistakable now, even through the phone's mic.
"Oh my god," Aiko whispered. "I'm actually touching myself right now—"
"Me too," Yuki admitted, panting. "I-I can't stop…"
Shin kissed Ai's neck again, a tender contrast to how intensely he was stroking her beneath the sheets.
"Come for me," he breathed. "Right here, in my arms. While they watch."
Ai's body trembled violently.
"Onii-chan—!"
Her climax hit hard. She arched, her thighs clamping around his hand, mouth wide open in a silent scream as wave after wave of pleasure crashed through her. Her pussy clenched tight around his fingers, spasming with wet, twitching pulses. She convulsed against him, her whole body shaking in his lap, helpless to the pleasure he poured into her.
And Shin held her through it, whispering, "That's it… that's my girl… so perfect…"
Ai collapsed against him, boneless and breathless.
The blanket was now nearly off her entirely, her body damp with sweat, her hair sticking to her face. The flushed red of climax painted her cheeks, her breasts rising and falling with every ragged breath.
"Still watching?" Shin asked, turning the camera again.
The screen showed both Aiko and Yuki—sweaty, panting, flustered messes.
"I can't breathe," Yuki whispered.
"Marry me," Aiko said to the camera. "Right now. I'll do anything. I'll be your pet. I'll cook. I'll clean. I'll bark. Just—just touch me like that…"
Shin chuckled low in his chest.
"You'll get your turn," he promised, stroking Ai's hair now as she clung to him.
Ai's voice was barely audible, muffled in his chest. "I love you… Onii-chan…"
He smiled, kissing the top of her head.
"I know, baby. I love you more."
---
END OF CHAPTER : 144 : FLAUNT IT, ONII-CHAN!
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