Disclaimer: I do not own Fate/Stay Night or Kamen Rider Saber. F/SN is owned by Type-Moon and KRS is owned by Toei.


As Touma was waking up, he could feel something heavy on top of his body. He slowly removed the blanket. His suspicion was confirmed, X was lying on top of him with... another Saberface? Unlike X, she had pale blonde hair and was wearing a blue school sailor uniform with a red scarf.

"What the hell did I get myself into?" Touma sighed inwardly, slowly removing himself from the two.

After he had successfully got out without waking either of them. He looked around the room and he could see Ryuhara sitting next to the door, staring at him with an impassive expression.

"What happened?" He asked, sitting down next to Ryuhara.

"Well, she just sorta... Appeared? I was about to attack her but... Her scent is similar to the other one." He said, pointing at X. "Then she took a look at your Command Spells and that led to... That." Ryuhara shrugged.

"I see." Touma mused, taking out the book about the war. "Huh. That's weird."

"You found anything?" Ryuhara asked.

"Yeah. She's X Alter. And she was summoned by special measures? It really doesn't elaborate any further than that. And I'm somehow her Master?" He sighed, putting the book back.

"What now?" Ryuhara asked.

"Well, I gotta explain to them about what happened yesterday. And Sakura too. Also, I leave the job of waking them up to you." He replied, quickly leaving the room.

"Welp, I can try heating them up until they wake up or until they get roasted alive." Ryuhara smirked.

Ryuhara did in fact wake X and Ecchan up. But little did he know, his action had heated up the entire mansion, forcing everyone to wake up in sweats except for Touma.

As you can guess, the moment that Ecchan met Saber wasn't one of peace or friendliness. She straight up pulled out her Necro-calibur and attempted to murder Saber on the spot. Even X joined in the attempt to eliminate Saber. Fortunately, they were stopped by Ryuhara before the situation could escalate any further. Touma, meanwhile, was buying some sweets.

After Touma finished his shopping errands, he finally went back to Emiya's mansion. Opening the door, he was greeted by X. Behind her stood Ecchan, who was gluing her eyes at the bag of sweets that Touma had bought. Even though this was their official first meeting, Touma couldn't help but chuckle a little, handing Ecchan the bag.

"Ah. Thank you Master." Ecchan said.

"It's nothing. But may I have your name?" He asked, despite already knowing it.

"Yes.. I am Heroine X Alter. My class is Berser- I mean Saber. Yes, Saber class Servant. Nice to meet you, Master." She introduced herself.

"Master. Everyone's waiting for you." X said, tugging her Master toward the living room.

"Hmm? Now that I look carefully." Touma observed both X and Ecchan carefully. "Did you try to attack Saber again?"

"I didn't start it, Ecchan did!" X exclaimed, pointing at Ecchan.

"Uh huh. Well, I already guessed that her name is literally yours, but with an Alter, she'd probably have the same Saber killing nature." He sighed, chopping both X and Ecchan. "Don't do it again unless I told you to. Or I will use my Command Spells."

Both X and surprisingly, Ecchan groaned. Touma advanced toward the living room, followed by X and Ecchan.


"So, Kamiyama-sensei. Do you mind explaining yourself yesterday and about that Servant of yours?" Rin asked, prompting everyone to look at Touma and Ecchan.

"Well... I can't really explain much about her. She was summoned by some other factions outside of the war? All I know is that she's my Servant and a Berser-"

"Saber." She cut in.

"Saber-class Servant." He continued. "And over there is Ryuhara, a friend of mine. As for me. Tell me, have you ever heard about Kamen Rider?"

"Ah, old man used to tell me stories about them when I was little." Shirou said.

"And I read about them a few years ago." Rin added. "Appearently, they work for the Sword of Logos, which is an enemy of the Mage's Association and the Church."

"Huh? Why is that? I thought that the Kamen Rider's job was to protect humanity. Why would they consider the Sword of Logos their enemy?" Shirou asked.

"You see Emiya-kun. It's not because of their job, it's because of what they have in their arsenals. The Holy Swords and the Wonder Ride Books. Also, protecting humanity is their side job. Their main job is to protect the Almighty Book." Rin explained.

"Tohsaka got it. Because of how strong the Holy Swords are and the fact that the Almighty Book basically is the entire human race's history from the past, present and future, the Mage's Association deemed that it was too powerful. So they had an all-out war with each other years ago. But in the end, the Sword of Logos appeared victorious. That's when the Church comes in. Because of their religious nature, they thought that the Almighty Book was actually a prophecy of god itself. So they tried to take it, but failed miserably." Touma said.

"I see. What about the Kamen Riders?" Asked Shirou.

"They're actually the Sword of Logos main fighter. They transformed by using the Holy Sword to fight to bring balance to the world. Or so they said, the Master Logos tried to use the power of the Almighty Book to destroy the world, but he was stopped by the other Kamen Riders in the organization." Rin said, giving Touma a look.

It was now that Touma seemingly took out the Kaenken Rekka out of nowhere, placing it on the table. "Yes. Me and my friends were the ones that stopped him. One of the Holy Swords that I owned is the Kaenken Rekka. Once given a Holy Sword, we can transform into Kamen Rider with the given Holy Sword and Wonder Ride Book. My alias is Saber. Kamen Rider Saber. But now, I'm nothing but a third grade swordsman. I haven't fought in a long time until yesterday."

"So Kamen Rider is like some kind of Hero of Justice?" Shirou asked.

"Something like that." Touma answered.

"Fufufufu." X chuckled, soon turning into a full laughter. "Fuwahahahaha!"

"X-san?" Touma called out. Everyone was confused about her sudden eruption except for two person. Saber and Ecchan.

"It has been decided, Master." X said. "I shall train you in the path of the Saber extermination!" She exclaimed, puffing out her chest proudly.

"I appreciate it, but I don't think I need to-"

"Nonsense. You said that you haven't fought in a long time, right? It's best if we get you back in shape. And I'll get to spend more time with you." She said, mumbling the last part.

"Don't worry Master, we'll guide you." Said Ecchan with sparkling eyes.

"Alright. I'll take on your offer." After all, he can't just say no. And having some exercises to get back to shape wouldn't be that bad.

X and Ecchan high fived each other while Saber could only frown further.

"I knew that Kamen Riders from the Sword of Logos was strong. But not this strong, even enough to kill a Servant multiple times." Rin mused. "But back to our discussion. Emiya-kun."

"Hm?"

"What the hell were you thinking yesterday."

"Eh?"

"Don't you eh at me! You literally ran toward Saber when she was about to get hit by Berserker!"

"Ah, that. Well, I tried to push Saber away from the attack. And it worked out!" Shirou replied.

"I swear to god. If it weren't for Kamiyama-sensei, you'd have died already." Rin sighed. Shirou tried looking at Saber, who was staring at Shirou with a concerned expression. He then switched to Touma, who gave him a "she's right" expression and shrugged.

"Jeez, you realize that she's connected to you and is living off whatever little mana she has left due to your inability to supply her. So if you die, Saber will disappear too." Rin said.

"I-I see... I won't do it again." He finally answered. "But I have a question. Is there any other way for me to replenish her mana?"

"Well, eating and sleeping can do so much as help her recover a little. But there is also another method, like bodily fluids." Rin replied.

"Bodily fluids? Like blood and stuff?"

"Blood would work, but not as efficient as semen." Touma said. "But." He continued, placing a blank Wonder Ride Book on the table. "You can use this as a gateway to transfer some of your mana to your Servant."

Shirou let out a breath of relief, while Saber had a somewhat content look on her face.

"Thank you, Kamiyama-sensei." Shirou said, taking the blank nook. "But how do I-"

"Just open the book, it will automatically drain the Master's mana and store it inside. And then, when the Servant opens it, they will start draining the mana from the book." Touma explained.

Shirou opened the book. He immediately started feeling weaker and weaker. He closed the book and handed it to Saber. When Saber opens the book, she can feel Shirou's mana flowing into her. She closed the book and gave it back to Shirou.

"Shirou, I can fight with full capability now." She said, and Shirou replied with a nod.

"That's good to hear. Now, what should we do about the Einzbern?" Rin questioned.

"About that, apparently, she is Kiritsugu's daughter and Shirou's older sister." Touma answered.

"That's impossible. If so, she'd be a grown lady by now, not a child." Saber responded.

"Blame the Einzbern, they made her a homunculi and modified her body since birth so she would look like that. And she's also the living vessel of the Grail in this war." He explained.

"So she's my older sister. Doesn't explain the entire kill everyone part, though." Shirou said.

"The Einzbern manipulated her into thinking that Kiritsugu abandoned her for you. So, as every daughter would do after knowing her father abandoned her for another child, she would want some revenge."

"Then can't we just talk to her to explain everything?" Rin suggested.

"We wouldn't be talking about this if it were that easy. She's out for blood, she wouldn't take talking for an option." Touma sighed. "First, we take Berserker down. Next, we talk."

"She did tell us his True Name and Noble Phantasm. That's going to help somewhat." Rin said.

"Mhm. Heracles and his Noble Phantasm allowed him to revive up to 12 times. And after he dies, he'll gain resistance to the attack that killed him. So whatever I did to him yesterday, I can't kill him again using the same method." Touma said.

"But I guess that's not the only thing you have in your arsenal?" Shirou said.

"Who knows? This is my first time fighting against a Servant." Touma shrugged. "Besides, isn't it best to let Servant deal with Servant?"

The Masters then turn over to their Servants. While Saber is still sitting next to Shirou, Ryuhara is nowhere to be seen while X and Ecchan are playing with the book that Touma used to transform the night before.

"Yeah, they'll be fine." Touma said without doubt. "But I still have something to talk about." He continued, looking at Shirou and Rin with a serious expression.

He then started talking about Sakura's situation, about how she's the Master of Rider, about how she is Rin's sister, about all the terrible things that Zouken and Shinji did to Sakura. Everyone was furious. Shirou immediately tried to get to Sakura but he was stopped by Touma.

"Calm down, Master." Saber said.

"Calm down!? Do you think that I can calm down after hearing that!?" Shirou retorted.

"What are you going to do once you get there? Get killed by Zouken? And what about the Crest Worms? Get real Emiya, you can't do anything right now." Rin said.

"Tohsaka... You!? She's your sister for god's sake!" Shirou said, glaring at Rin. The expression of the girl was anything but calm and collected. All of this information is too much for Rin to take in. She was furious, sad, shocked and concerned. Rin clenched her fists harder, almost drawing blood.

"Don't worry, I have a plan to kill Zouken and save Sakura." Touma said. "But we can't act now. If things go south, we'll get Sakura by tomorrow. I promise." He switched his gaze to Rin and continued "And Tohsaka, can you help Emiya with practicing his Magecraft? He doesn't have any Magic Crest and can't even turn on his Circuit at will. He specialized in Projection and Reinforcement Magecraft, Archer could help him in that field of expertise."

She nodded, curious about why Touma knew this much about Shirou.

Later, Rin gives Shirou a jewel to forcefully switch on his Magic Circuit, allowing him to switch it on at will. Despite Rin telling him to take a rest after that, Shirou still insisted on training his Magecraft. Archer refused to help Shirou at first. But after a while of observing Shirou failing at the simplest trick, he reluctantly agreed to train Shirou. Of course, he mocked him at every single opportunity given.

As for Touma, he has started his training to become the strongest Saber-killer. Or so X and Ecchan said. But in reality, they're just sparring with each other.


"How odd, another Berserker has been summoned." Kirei said.

"Hoh? This is interesting." Gilgamesh mused.

"But how could another Servant of the same class be summoned? The Grail shouldn't be capable of doing that." Kirei assumed.

"Does it matter? Another one or two dogs wouldn't be of any problem." Gilgamesh scoffed, taking a drink from his glass of wine.

"I suppose you're right, King of Heroes."


"This is... Interesting. The Grail was never meant to summon more than intended. Unless..." Zouken mused. "It doesn't matter, I doubt it would affect the plan."


"And the Servant successfully got to Touma!" Tassel cheered.

"Haha! I told you it would work!" Zooous exclaimed.

"Well, I'll be damned." Storious said.

"Do you guys have any idea what you just did?" Luna scolded.

"Gave Touma another Servant to further improve his chance at victory?" Legeiel replied.

"Yes, but that's not the point! He can already win the war by himself. Summoning him an extra Servant wouldn't do him any good. What if the Counter Force takes action?" Luna added.

"Oh..." The former Megid trio looked at each other

"It would probably be fine. The last time I tried to destroy the world, it barely took any action." Bahato chimed in.

"I mean yes, but still..." Luna sighed.

"Don't bother with them, Luna." Master Logos said.


Author's Note

For anyone wondering how Ecchan got here, Tassel, Bahato and the former Megids group summoned her to Touma using book magic, despite Luna and the first Master Logos trying to stop them (And I'm a big Ecchan simp so there's that.). And for the question about Primitive. Yes, he can technically beat Berserker with it, but it will take him some time to change his form, so it'd be better if he just used Elemental Dragon for more viability and remember, he can also scan the book against the tip of the blade for the finisher. Anyways, hope you enjoyed this chapter.