Alright, this chapter is very focused on the BDSM side of this story. For those of you who aren't here for that sort of thing, I would recommend skipping until after the first scene break and just reading on from there.

A reviewer pointed out that I should have introduced Sakura more for people not super familiar with FSN lore, and I just want to acknowledge that it is a good point. Unfortunately all I'm doing with this story here is reuploading it to catch up with where I am over on QQ, so I don't plan to make any changed. But it was a good point.

Chapter Six

Rin closed her eyes, trying not to let her nerves drive her away again.

She was kneeling on the floor of Emiya – of her Master's dojo. Waiting for him to return. To punish her. For the first and hopefully last time.

In some ways she was glad for the coming punishment. Her head was still spinning from everything that had happened earlier in the day. Discovering what Shinji had done to Sakura... it made her so angry that she wanted to throw herself against the nearby wall and bash her head against it. She still didn't know how it had happened. Sakura had enough magical ability to become a Demi-Servant, but Shinji definitely didn't have what was needed to serve as a Master. Both physically, and emotionally.

Luckily, her own Master was already determined to free Sakura. Rin wouldn't need to do anything to disobey her father's wishes. She just had to obey her Master's orders, and that would naturally result in Sakura becoming safe again.

Of course, obeying her Master was also something her father would disapprove of... Ugh, what a mess. But she had made up her mind already.

Earlier in the day, when she had been running away from her problems like a child, Rin had spent a lot of time thinking. The decision she had finally reached was simple. She was in too far now to stop. She had already done all the damage to the Tohsaka legacy that she could, by taking a Master in the first place. Since there was no changing the past, all she could do going forwards was do the best she could to be the ideal Servant.

Even if that meant wearing a naked apron and submitting to punishments like this one...

For now, this was her lot in life. After the war... well, she would see.

Shirou returned before too long, carrying a small wooden table. He wasn't wearing a shirt, which made her heart start to beat a little The signs of the injury on his arm were still present, wrapped up in a bandage, but he had said the pain wasn't enough to bother him.

"Rin." Shirou said. "It's time."

Rin tried to fight the heat and excitement rising in her body. She was elated and nervous all at once, like a child before their first day at school. She didn't know why on earth she was excited for a punishment, but it was true. "Okay, M-master." It was always harder to call him that, during moments like this.

At least he hadn't made her put on anything strange. Her clothing was projected, but it was a projected set of clothing very similar to her actual style. Dark reds, with a short skirt and thigh high leggings.

Shirou put the table in front of her. It was small and wooden, rising up to about her waist. "Bend over this." He commanded her. His cheeks were red from a slight blush, but his tone was steady.

Rin felt like she was going to implode. "R-right." Gripping the other end of the table, Rin bent over it so that her stomach was laying across it while her legs hung over the side. It made her feel almost naked, and very very vulnerable.

Like this, her Master could do anything to her.

He put a hand on her thigh. She wanted to jump, and she wanted to moan, but she held both back. His grip was strong, and all she could focus on was just how very powerful he felt right now. "Rin." His tone was harsh. "When I give you an order, you are to respond 'Yes, Master'. Understand?"

"Y-yes, Master." Rin managed to squeak out. Her cheeks were practically on fire now. She really did say that most of the time!

Shirou pulled up her skirt. She was getting warmer just thinking about how exposed she was, how he could see everything, and then all at once it got worse when he pulled her panties down to her ankles.

She gulped. There was no hiding it now. The cold air hit her between the legs, revealing to all the world that she was dripping wet. She Tohsaka Rin, was getting off on the thought of her Master punishing her. It was enough to make her want to run away again.

"Rin." Shirou said. He sounded absolutely intoxicated, which made her feel strangely proud. He held a hand out with an open palm, where she could see it. "Make me a riding crop."

She had to make it. Something about that thought was so illicit that it made a shiver run up her spine. She had to swallow before she could speak. "Yes, Master." It was worryingly easy. The riding crop she made was pure black, with a handle that somehow fit perfectly in Shirou's hand.

She expected him to start immediately, but instead he pushed the thin end into her face. She looked up at him, seeking instruction. He only nodded at her, and acting out of instinct Rin reached her mouth forward to kiss the instrument that would soon be whipping her. It tasted like leather, and sin.

Her Master circled around her, and she had only a few seconds warning before the small whip cracked across her backside. "Ah!" She cried out, as the pain hit her.

Master hadn't hit her as hard as he could of. Far from it. But she still felt a sharp pain where he had struck her.

"Th-thank you, Master." She said, because she felt like she had to say something. There was a knot of tension beginning to form inside of her, like she was standing on the precipice of something.

"Good job, Rin." Master said. His words flowed over her like fine wine. She couldn't understand why it made her feel so warm and touched to hear such simple praise.

And then he struck her again, on the other side this time. She gasped, holding back a moan. There was an even shorter pause before the next one, a sharp crack that left a red mark between her thighs.

As the session went on, each successive swing was became harder than the one before. Soon her entire backside was red and warm, and hurting so good that she wanted him to keep going forever.

But it had to stop eventually. On the fifteenth spanking, he laid the riding crop down on the table beside her. "M-master?" She asked. She felt like she was so close to... something. She wanted nothing in the world more than for him to continue. Her cheeks burned. Her pride won out over her aching need by the smallest fraction, and she stopped herself from openly begging. "You can, can keep going if you really want to. I know... I know I was a bad girl."

"No, Rin. Now it's time for your reward."

A pleasant weight pushed her down as Shirou bent over her. His hand traced the inside of her thighs, before slowly rising upwards between her legs. When he first laid his hands on her wet core she tried to jump away, but his superior mass held her down. Or more like, she let him hold her down.

"Maaaasstteeerr." She groaned out. His fingers hand gone to work, pumping inside of her. She wanted more. Something larger and warmer, but right now her need was so intense that she would have gotten herself off with the corner of this table if he hadn't done anything.

It was embarassing how quick she finished, but as soon as his thumb brushed against her clit, she was driven over the edge. His comfortable weight held her down, stroking her gently as her entire body shook and the pleasure became so intense that she could hardly think.

"There we go." Shirou said, sounding far too pleased with himself. When her breathing had returned more or less to normal, he pulled off of her and allowed her to pull herself to her feet. She was a wreck. Her ass still stung from the spanking, and at some point she had kicked away her panties without noticing, but she still felt more fulfilled in that moment than she ever had working towards becoming a magus. "Good work, Rin."

He held out his arms, and Rin allowed him to wrap her up in a hug. She rested her head on his chest, wishing this moment could go on forever. "Thank you, Master."

X X X

It was not until later that day that the two of them allowed themselves to get serious again. It felt wrong to talk about serious matters while she was still recovering. And while she was still trying to figure out how she could ever look Shirou in the eyes again considering how thoroughly he had dominated her, and how easily she had gotten off to the treatment.

She wasn't 100% better. When she sat down, she could still feel pain in her backside. Pain that reminded her of the feeling of being helpess before the riding crop in her Master's hands, which she had obediently made and kissed for him... but as long as she didn't think about that too much, she could focus.

"So, if our objective is to rescue Sakura, our only real solution... is to kill Shinji." Shirou said. There was a dead weight in his eyes. She wondered what was going on in his head, as he considered killing one of his oldest friends. He was hard to read normally, but right now he was like a brick wall. She could sense some big internal war going on within him right now, but couldn't make out any details.

"Not necessarily, Master." Rin responded. "That would certainly end the bond between them. But we can't confirm that he hasn't put some kind of contingency measure in place. The best thing we can do would be to kidnap Shinji, and force him to use his command seals to end her curse. And then to remove the Heroic Spirit within herself."

That was a right any Master had. To command a heroic spirit to return to the grail, thus making the Demi-Servant into a normal magus again. Shirou frowned. "But that's easier said that done."

"Yes." Rin nodded. "That's my most preferred option. As for number two..."

She held out her hand and called a dagger into existence. One of many weapons contained within her arsenal. "Rule Breaker." Shirou said, his eyes widening. She wasn't sure how he always knew what weapons she was summoning, but she assumed it had to do with their bond.

"Yes. With this, I can sever their connection and make it so that Shinji is no longer Sakura's Master." Rin said. The knife was small and hardly designed for combat, but it shouldn't be impossible to strike one of them with it.

"But we don't know if that will fix her insanity." Shirou said.

Rin had to nod. "Yes. However, it's far better than the alternative."

And it would still leave Sakura as their enemy. After all, only one Servant and one Master could win the Holy Grail War. She would prefer to solve this by eliminating that possibility, somehow. But her Master was going to order her to prioritize Sakura's safety... and she could live with that.

"Okay. In that case, don't resort to that unless it's absolutely necessary." Shirou said.

"Yes, Master." Rin said.

Now all that remained was to pick a battlefield.

Next chapter we'll pick up with a fated confrontation!