Takumi/Kamui hatesex-turned-love

It had started off almost innocently. First, he had teased her for not using the chopsticks correctly during the dinner celebrating her return to Hoshido. Kamui had shrugged it off, since siblings teased each other all the time.

Then he got annoyed when she continued to wear her armor even after Ryouma said it was fine.
"Everyone in the kingdom knows of your decision, Kamui. In many ways, your fighting for Hoshido in the armor of Nohr is a sign of pride."
Hinoka and Sakura had agreed, but Takumi still seemed sour on the idea.

He often watched Kamui during quieter moments, and he watched even closer when she was speaking with Felicia and the others who had followed her from Nohr. Takumi's subordinate, Hinata, seemed surprised at how friendly she was, saying she was nicer than what he'd heard Takumi say about her. That rubbed Kamui the wrong way, but she decided to shrug it off.

Then there was the incident with the bath. As was customary, Kamui, as the third eldest, went in after Ryouma and Hinoka. Just as she was beginning to enjoy soaking, the door opened. She quickly grabbed Yatogami and stood up. In the door way was Takumi, who seemed ready to get in the bath himself. For a moment, they just stood there, staring. Finally, Takumi said a quick apology and shut the door.

After that, Takumi's hostility began to grow more obvious, not just towards her, but toward everyone. He started avoiding her and insulting her when he couldn't. He yelled at Felicia when she broke a place, driving her to tears. Even when Ryouma scolded him, his attitude didn't let up. One evening, Kamui caught Oboro in the training hall, practicing her lancing with tears spilling down her cheeks. She refused to say anything to her, but Hinata gave her the story, explaining that she and Takumi had an argument.

Kamui finally made the decision to talk to him in the morning, but the final straw came immediately after.

As she was preparing for bed, she bumped into Hinoka, who was grumbling about Takumi under her breath. When Kamui asked what the problem was, Hinoka explained that she'd decided to stop crawling into Kamui's bed whenever she had a nightmare.

When Kamui first arrived (or rather, returned) to Hoshido, Hinoka had been rather clingy and often crawled into Kamui's bed at night to make sure she wouldn't disappear. Ryouma explained that Hinoka had taken Kamui's abduction rather hard and asked her to be patient with her. It hadn't bothered Kamui, so she'd never said anything about it. Hinoka explained that Takumi said he was relieved when she told him. He said it was inappropriate.

For Kamui, that was the last straw. She decided to confront Takumi immediately. She stormed up the stairs and knocked on his door. When he gave permission to enter, she slid the door open. Takumi looked up and scowled.
"Is something the matter, Nee-san?"
"Why did you say that to Hinoka-nee-san? And not just her, Hinata said you had an argument with Oboro." Kamui demanded.
"About her crawling into bed with you?" Takumi sighed. "I told her it was good that she was going to stop. You're sisters. It's improper for you to be sharing a bed at your ages. As for Oboro, she was behaving inappropriately."
Kamui slid the door shut.
"How so?" She asked, narrowing her eyes.
He glared at her before turning his gaze back to the paper he'd been reading.
"That's none of your concern."

"I think it is."
He slowly looked back at her.

"I've noticed that you don't like me. I kind of get it. I spent most of my life in Nohr, and you think I'm spying or going to betray you. You're not any nicer toward Cyrus or Felicia or any of the others who came here with me. But this goes further than that. You're being needlessly cruel to everyone, even your subordinates and the sister you DID grow up with."

Takumi put the paper on his desk and stood up.
"If this keeps up, it might spread to the general troops." Kamui continued. "If Hoshido's own prince is cruel to even his own family, it could affect morale. Why follow a prince like that?"
Takumi scowled again and looked away.

"I cherish my memories of Marx-nii-san and the others, but that bridge has been burned." Kamui said quietly. "Even if I wanted to go back, I suspect they'd kill me on sight."
"It's not about whether or not you'll betray us." He quietly admitted. "I've seen you save ordinary soldiers on the battlefield when it didn't seem like anyone could see you. I know you're committed."
"Then what IS it about, Takumi?" Kamui demanded. "Are you angry that I've gotten close to Ryouma-nii-san and the others? I've been separated from them for a long time, Takumi. I want to know them! I want to know YOU! But you won't let me! I want to know why!"

"Because I can't see you as a sister!" Takumi exclaimed.
She'd suspected as much, but it still hurt to hear him admit it out loud.
"I... I see." Kamui said slowly, not paying attention as Takumi leaned in closer. "I suppose we met a little too late for that, huh?"
"Far too late." Takumi's breath was hot, and Kamui trembled.
"Then... If you can't see me as a sister, would it be possible for you to see me as a... com... rade?"
She began to trail off as something warm and wet began to move along her neck. Given the proximity, it only made sense for it to be Takumi's tongue.

Takumi's tongue was moving up and down her neck.
The tongue of her biological brother, Takumi, was moving up and down her neck.

"What... What are you doing?" She asked slowly.
He answered by biting down on her neck.
"OW!" She winced.
"Every fucking time I look at you, I think of your naked body." He whispered.

Kamui's mind reeled. He thought of her naked? Was this about the night he'd walked in on her in the bath?
"You mean to say you've spent the past several days avoiding me, insulting me, and yelling at everyone because you wanted to have sex with me?"
Takumi didn't answer, but the silence was very telling. She shoved him to the floor.

"You're an arse, you know that?" She growled at him. "Frustrated because you want to have sex with your sister, so you take it out on everyone else."
"Go to hell." Takumi snapped back.
"My brother just admitted to wanting to fuck me, and I'm actually going to let him do it. I'd say I'm already there."
Takumi paused as the information sunk in.

"You're... what?"
Kamui pulled her robe off and dropped it to the floor. Takumi quickly looked away.
"What's wrong? You admitted that you've been thinking about me naked."
"How can you... How can you be so brazen!?"
He looked up and looked at her suspciously.

"Don't tell me those Nohrian princes..."
She silenced him with her foot on his dick.
"Watch your words."
Takumi pushed her foot away and stood up, pulling off his own robe.
"So what position is my adorable little brother going to take me in?" Kamui asked in a cutesy voice.
"Don't talk like that!" Takumi protested. "Seriously, how do you know this stuff?"
"I grew up with Princess Camilla. Do you really think she didn't make sure I'd know what to do?"
"Fair point."

They stood there for a moment.
"I was being serious, you know." Kamui explained. "I'm going to leave it up to you."
"F-fine. Just... Just lie down on the futon."
Kamui complied, lying back casually. Takumi knelt down and spread her legs apart. Just looking at her and thinking of what they were about to do was making him hard.
"Say, Nee-san... Just how much did she... teach you?"
"I'm still a virgin, Takumi." Kamui rolled her eyes.
"Just checking." He smirked as he pushed his way in roughly.
"B-bastard." Kamui winced.

"You didn't even kiss me." Kamui growled. "We just started and I already know that you're terrible at making love."
"I'm pretty sure only people that love each other "make love", Nee-san." Takumi scoffed as he leaned in to kiss her.
The kiss was as rough as the penetration. Their teeth kept scraping against each other.
"You're... getting wetter." Takumi noted.
"Yes, that's because I'm somehow getting aroused by this." Kamui explained.
"Are you saying you like it rough?" Takumi smirked as he started thrusting.
"Not particularly..." Kamui grunted. "But stimulus is stimulus, I suppose."
The banter went back and forth for a short time until Takumi abruptly came inside of her.
"So not only did you not pull out, but you didn't even wait until I was done." Kamui groaned as she pulled her robe on. "We've got a LOT of work to do."
"Are you saying you'll..."
"If you won't accept me as your sister, then I guess I can accept being your fuck-buddy, as long as you promise to work on your attitude." Kamui sighed as left the room. "Good night, Takumi."

It was three days later that Takumi accepted Kamui's offer to be "fuck-buddies", for lack of a better term. They were fucking, certainly, but they weren't buddies.
"I'm glad to see you've been getting along with Kamui better." Ryouma told him one evening. "I was worried that you wouldn't accept her, but it seems you've been getting closer."

They certainly had gotten "closer". Physically, at least.
There were nights when Takumi went to her room, and nights where Kamui went to his room. After the first time, Takumi decided to stop being rough with her.

They never stayed when they were done, and for some reason, that bothered Takumi. When he asked her about it, she snickered.
"Are you lonely without your big sister sleeping next to you?"

He'd glared at her, but left without further comment.

The next time she came to his room, however, he kissed her before saying anything.
"This is a surprise." She gave him an odd look. "You don't normally kiss me."
"I want to do things differently this time." Takumi explained. "Let's get completely naked."
Kamui still seemed confused, but complied.
He kissed her all over her body. Over her breasts, her neck, even her pussy.
"You're being unusually affectionate." Kamui smirked at him as he entered her. "What brought this on?"
"I just felt like it."

Unlike most of their other sessions, Takumi decided to go slowly.
"This is... Even stranger." Kamui frowned, but she didn't seem to be complaining. On the contrary, she seemed to be enjoying it. He kissed her again and she slowly lifted her legs to wrap them around Takumi's waist.
It went on for what seemed like hours before Takumi finally came inside of her.
"You didn't pull out..." Kamui sighed.
"Sorry about that."
Without another word, Kamui began to pull herself out of the futon. Takumi grabbed her wrist.

"I'd like it if you stayed." He said quietly.
Kamui gave him a surprised look, but agreed, and lay down next to him.

She was still gone when he woke up the next morning, and the emptiness that filled Takumi made him uneasy.

It was a couple months later that Takumi heard some surprising news.
"You and Oboro have... become a couple?"
"I'm just as surprised as you are, Takumi-sama." Hinata shrugged. "I finally got up the nerve to tell her how I felt, and she accepted."
"I see. I'm happy for the two of you."
"I'm sure it'll happen to you, one day, Takumi-sama." Hinata grinned at him. "One day, someone will ask you about them, and their face will pop into your head."

As Hinata walked away, Takumi made his decision. Kamui had left to go see the doctor, but she should be arriving home soon. He looked out the window toward the gate and saw her walking in at a brusk pace. He quickly left his room and went down to the hall to greet her.
When she saw him, her face turned pale and she hurried away.

"Kamui-nee-san, I have something important to tell you."
"I... I have something important to tell you too, Takumi, but I can't say it here." There was something odd in Kamui's voice, but Takumi nodded and followed her to her room.
"I know that this may be improper..." Takumi began.
"We're related by blood, so this is... more than a little wrong, but..." Kamui started.

"Kamui-nee-san, I love you."
"Takumi, I'm pregnant."

For a moment, the two sat there, giving each other puzzled looks before they both began speaking at once.

"You... love me? Like, love-love me?"
"You're pregnant?"

There was another long pause before Takumi spoke again.
"Is it... mine?"
Kamui glared at him.
"Idiot, of course it's yours! I would have told you if I started sleeping with someone else."
Kamui looked away for a moment before speaking again.
"Are you... Are you sure you're in love with me?"

"I am." Takumi looked her right in the eyes. "I'm sorry that I wasn't able to accept you as a sister."
"I can't really complain about that anymore." Kamui shook her and laughed sadly. "Ever since this started, I started to look at you as a man."
"Are you saying-"
"Yes, I'm saying I love you, too." Kamui groaned. "I'm kind of going through a lot of emotions right now: I realized that I was in love with my biological brother when I found out that I was pregnant with his child. And then he tells me he loves me back."

Takumi leaned forward to kiss her. It somehow tasted much sweeter than the other times they kissed. When he pulled away, Kamui gave him a stern look.
"You understand we're going to have to tell Ryouma-nii-san, Hinoka-nee-san, and Mother about this."
"I know."
"They're bound to be furious."
"They certainly will."

Their future was uncertain. And yet strangely, neither of them felt afraid.