"Big Bro, I'm here!"
Chihiro called out as she opened the door to her brother's place and stepped inside. She used to knock and wait for him to let her in, but they'd reached a point of trust where she could just come in, since the only time he was ever unclothed or doing anything else he didn't want her to see, he was in the bathroom. But from the door, she could see him lying on the floor, groaning. Her eyes widened and she quickly removed her shoes and set the bags for dinner down on the counter before rushing up to Itsuki. "H-Hey! Are you okay?"
"Nayutaaaaaa…" he groaned.
"Nayuta? Did something happen?" Chihiro asked.
"We had a fight, and it got pretty bad. I don't think we broke up but…who knows…I'm pretty shitty…"
"Hey! No! Don't say that!" Chihiro quickly said. "You're amazing, and she's lucky to have you!"
"Chihiroooooo," Itsuki cried out as he grabbed onto the girl's arm. Chihiro's nose flared and between the smell and her brother's voice, he was clearly drunk. "You're the best brother I could've haaaaad…"
Chihiro inwardly cringed a bit at being called 'brother' as she still hadn't been able to reveal herself to Itsuki, worried about what he would do if she did. "L-Let's get you into bed, okay?"
"I wish I had a little sister like youuuuu~" he said as Chihiro helped him to his feet and brought him over to the bed. As they walked, however, Itsuki stumbled, and ended up falling, taking Chihiro down with him. She squealed as they fell, hitting the corner of the table on the way down.
"Ow…" Chihiro groaned as she looked up before suddenly going red as she realized she was lying on top of her brother, her chest against his.
"Soft…?" Itsuki asked in confusion. "Feels like boo-"
"A-AHHH!" Chihiro cried as she quickly pulled herself up. "S-Sorry, are you okay, um, maybe we can-" Chihiro had quickly begun talking to try and distract him from the fact he must've felt her small bust even through her clothes, but as she stood, she froze. She felt a breeze on her legs, and her red face burned even hotter as she slowly looked down to find that the table had caught her pants, which were now down around her ankles.
And her cute panties were on full display.
"P-Panties?!" Itsuki cried in shock. Chihiro screamed as she quickly tried to pull them up.
"I-I can explain, I swear!" she cried as her mind raced for an excuse.
"Panties…soft sensation that feels like boobs…" Itsuki's eyes went wide as he stood so fast he nearly stumbled, and pointed at her. "Chihiro! Are you a little sister in disguise?!"
"Wh-What?! N-No, that's-!" Chihiro mentally yelled at herself. Here was finally her opportunity to say if, to finally tell him, and she was still denying it. Yet before she could say anything else, Itsuki lunged and placed both hands on her chest, squeezing. Chihiro gasped as a white-hot bolt of something she couldn't identify at first shot through her, and Itsuki looked stunned.
"You are a girl! You're…" His eyes suddenly became unfocused as Chihiro tried to remove his hands from her chest, her face redder than the time that one guy had tried to strip her in public. "You're my…little sister?"
"I-I am, yes," Chihiro finally admitted. "I-I'm sorry I didn't tell you, it's just-"
Itsuki kissed her.
Her eyes went wide as he felt his hot lips against hers. She fell backward onto the bed, but he followed after her, keeping his lips locked onto hers. It felt…weird. But to her shock, it wasn't weird in a bad way, more weird in a way that she could tell he had never kissed someone before.
She squealed when she felt his hands on her chest again, kneading her small breasts through her clothes. She grabbed at his wrists to try and pull them away, but his grip was surprisingly tight. His kisses were rough, but she couldn't shake free of him.
"I love you, Chihiro~" Itsuki said softly, which made Chihiro freeze in her tracks almost completely.
"Wh-What?!"
In her shock, he grabbed the bottom of her shirt and flung it up past her bra, exposing it to him. She squealed into his lips and grabbed at the shirt to try and pull it back down, but his hands had already gone up to grasp her breasts again, this time with only the thin fabric of her bra separating them. Her body trembled at his touch, and she continued trying to push him off. She didn't know if it was her weakness, or some surprising strength he had, but she couldn't budge him.
His tongue flicked against her lips, and though she tried not to let him in, his tongue slithered past anyway and eventually began to wrestle with her own. She groaned as his hands squeezed and played with her small breasts, feeling her nipples becoming hard.
One of his hands slid down from her chest to her pants, where he flicked them down, back down to her knees. Her eyes widened as she grabbed at them, but he used his foot to push them down further out of her grasp as he pressed his hand against her groin, feeling her through her panties. She let out a loud gasp as her body convulsed, which caused her feet to lift out of her pants, leaving her only dressed in socks and panties from the waist down.
Finally, Itsuki pulled away from the kiss, a thin line of saliva connecting them, and Chihiro caught her breath.
"I-Itsuki, st-stop! W-We can't do this!" she cried as she resumed her efforts to push him away, even as she felt her strength ebbing away from how he was rubbing between her legs.
"I can't believe I never noticed it before…how pretty you are," he said, and Chihiro, strangely enough, felt butterflies in her stomach at those words.
"I-Itsuki…seriously, we—AHHHH~!" She cut herself off with a moan as he pressed his finger in while his other hand grabbed her bra and yanked it up. Her breasts became fully exposed, and Chihiro cried out as her face burned with the intensity of the sun. She barely had time to register her embarrassment that her brother was now able to see her bare breasts before his hand was one. "GAAHHHHHH!" she groaned as his warm hand grasped her entire breast in a single handful. Her body shook as, to her horror, she could feel herself growing wet. Itsuki paused on his hand movement down below, having likely noticed. "Th-This…this isn't…!" she tried to plead.
Before she could speak further though, he grabbed her panties and yanked them down, finally exposing her pussy as well.
"NOOOOOOO!" Chihiro screamed as she fought against her brother with all her might, but it was still useless, especially with how weakened her body had become as her mind swirled with arousal, especially once her brother rubbed his finger against her wet lips directly, as well as squeezed her breast with even more ferocity.
"You're so pretty…" he said again. "So…hot…" She could smell the alcohol on his breath as he touched her, her body reacting in a way she didn't want that was beginning to overwhelm her senses. Her logic and reason were flying out the window as she was no longer fighting back, especially as his finger now slid directly inside her.
"AHHHHHH~!" she gasped with pure pleasure as he thrust the finger in and out of her. His lips were on her neck now, and she hated that it felt good, that she almost wanted more. He pinched her sensitive nipple and twisted it, and it was like fire through her veins as her body responded by twisting upward, her back bending, almost like she wanted to bring her chest even closer to him.
Her body was screaming for more, begging for it. Even though they were siblings, even if not by blood. It was wrong, and yet…Chihiro felt good.
He added a second finger to his thrusting between her legs and as the sensation and schlicking sound reached her ears, her hesitation was only further washed away. Her brain fought to maintain any sort of control it had left, to keep reminding her that this was her brother and that this was what she'd been afraid of, but it was losing. It was losing to the part that was telling her how good it felt, how much she was enjoying him calling her pretty and saying he loved her.
Her moans became louder and louder as pressure built inside her at a frantic pace. She knew what was coming, and she couldn't believe herself when she mentally snapped a leash on it, trying to hold it back. She didn't know where it came from but all of a sudden, she didn't want it to end. She wanted this incredible feeling to last forever.
"Chihiro…Chihiro…" her brother moaned as his fingers moved at a blinding pace. The pressure inside Chihiro built more and more and more until it was becoming almost too intense to bear. She was on the brink, and all it took for her to go over was for Itsuki to lean in and whisper in her ear. "I love you."
She came explosively, cumming hard onto Istuki's hand as her juices burst from her like a dam. Her entire body trembled with her effort of the most powerful climax she'd ever experienced, especially given she didn't masturbate very often. It felt like minutes passed before she collapsed back onto the soft bed, gasping for air. She barely noticed when Itsuki stood and reached down. She spent several moments catching her breath as she heard rustling. Her heart was pounding. She couldn't believe her brother had just brought her to a climax. And she couldn't believe that she had—at least somewhat—liked it. That she…wanted him to do it again.
Then she felt it. Something hard pressing against her sex that made her heart stop.
She looked down to find Itsuki grabbing her hips, his pants and boxers around his ankles, the head of his dick pressed against her. Initially, fear raced through her core, along with that voice again saying "No, this is wrong! We can't do this!" But as she felt it poking her, the other part of her brain won out again, the part that hadn't realized how much she'd wanted this until he had given it to her. Her eyes moved up to meet his, and she was surprised to see he was waiting. Waiting for her.
She could say no, and he'd probably listen. He was already so drunk he probably wouldn't remember any of this anyway. She could end this right now and they'd never have to talk about it again.
She gave him a nod.
And he pushed inside her.
She screamed as intense pain blasted through her, radiating through her core. She should've expected it, given she had been through sex ed, but even so, she hadn't expected it to take her breath away like that. Still, she knew it would eventually fade away, she just had to ride it out. Thankfully, Itsuki seemed to want to take it slow, despite his earlier roughness. He gently thrust his head in and out, grunting. "So tight…"
Eventually, the pain began to ebb away and pleasure was slowly moving in to take its place. Even when Itsuki started to thrust further inside her, the sharp pain she felt almost immediately went away as moans left her lips again, feeling the hard waves of pleasure rock against her body. He bent his body forward and placed his lips against her neck again as both hands rested on her breasts, squeezing them and bringing even more ecstasy coursing through her.
Before she knew it, he was sliding his entire length in and out of her, and she nearly laughed at the absurdity of the fact she was having sex with her brother, something she had been worried about happening. Now, she wanted nothing else, nothing more than his dick inside her the way they were now.
He began to speed up his movements, his balls gently slapping against her skin with every slide in. The room became filled with the sound of their sex, as well as Chihiro's adorable moans that were like music to Itsuki's ears. For Chihiro, between the sex, and the kisses, and how he was groping her chest so vigorously, she could already feel a growing pressure inside her gut once more. She knew she would be able to last long like this.
She made a mental note to try masturbating more if that kind of stuff could feel this good and then felt embarrassed at her mental note.
Not that she could barely even concentrate on what she was thinking about, with how her body screaming in ecstasy was overloading every other part of her thinking process.
"Ahhhh…B-Big Bro…!" she moaned, feeling the boy stiffen and shudder at her words before he upped his pace even more. He pinched both nipples and pulled on them as his other fingers continued stroking her breast, sending more bolts through her as she gasped. She had a feeling he was close by the way his dick was throbbing inside her. She was almost worried he would cum first.
He seemed to realize that too, however, and had a solution. He let go of one of her breasts and brought his hand down to her pussy, where after feeling around for a bit, he seemed to find what he was looking for. Without a second to spare, he pinched her clit.
It sent her over the edge, and she let out the loudest moan she'd ever made as she came even harder than last time. As her fluids spilled onto him, he plunged his entirety inside her and came as well. His cum shot out of him like a hose and filled her almost instantly, flying into every crack and crevice inside her until it was leaking out of the sides. Both of them held each other tightly as they finished together before it was all over. He pulled out, spraying a bit of cum onto the floor as he nearly stumbled back onto the table, then forward onto the bed. He groaned as she shifted around until he was lying with his head on the pillow, panting.
"I love you…Chihiro…" he said softly, and Chihiro found herself moving around as well until she was next to him, and gently brought his head to her chest, feeling him stiffen for a moment before relaxing again as he wrapped his arms around her to pull her close, settling against her small, yet soft chest.
"I love you too, Big Bro," she said in return, and she saw him smile as his breathing slowly evened out.
Within a few minutes, he was fast asleep, and she let out a deep breath, still leaking a bit of cum from her pussy. She let out a small chuckle.
It hadn't been how she'd expected to come out to her brother, but she couldn't complain. Even if she'd been averse to it at first, she'd come to see that maybe this was what she'd wanted. She just hadn't realized it until she'd had a taste of it. And now…
She gently stroked his head, wondering if he'd even remember it in the morning. She hoped so, even if it would cause some problems considering he was already dating someone.
Even so…she could imagine herself in a relationship with him. She already felt like a housewife as it was, and it always made her happy to cook and clean for him. She just wondered if he would see her as more desirable than Nayuta. Chihiro felt her smile become sad as she imagined him rejecting her, imagined him feeling shame for what he did and not wanting to face her again because of it.
But the alternative…a life where they could do this again, do it more often, maybe even try new things together—since even with as little knowledge of sex as she had, she knew there were a lot of aspects to it—that sounded incredible. Beautiful, even. And even then, she always enjoyed the time she spent with him as it was, even when they were just hanging out, like the time they went to the aquarium. She enjoyed…being with him, supporting him…loving him.
She sighed. Oh well, she could think about it in the morning. For now, as she looked down at her brother's sleeping face nuzzled against her bare chest, she felt content.
She could stay like this…just for a while.
Then she'd made dinner for him, just like usual.
And the thought brought a smile to her face.