The previous night…

Shirou, Rin, and Saber sat around the table eating dinner. Well, Saber was eating. Rin and Shirou had long since finished and were simply marveling at Saber's ability to keep eating. Saber finished her fifth bowl of rice and held out the empty bowl to Shirou.

"Excellent as always, Shirou," Saber said. "May I have some more?"

"Of course, Saber!" Shirou replied. "Eat as much as you like!"

A flash of light suddenly enveloped the room, blinding the inhabitants. When their vision returned to them, a teenage boy, slightly older than Shirou and Rin, with blonde hair and bright blue eyes, was standing on the table looking very confused. The room's original three inhabitants looked incredulously at the boy, who gave a nervous smile in reply.

"Um… hi," he said.

Moments later, Saber was in her battle wear, chasing the boy through the house, swinging her invisible sword at him. The boy managed to stay just out of range at all times.

"Ah! What are you doing?" the boy exclaimed.

"That's my line!" Saber replied. "Who are you, and what are you doing in this house?"

"Uzumaki Naruto, and I have no idea!"

Saber lunged forward and stabbed at the boy. He whirled around with some sort of swirling blue orb in his hand and, somehow, managed to place it right in the sword's path. The two attacks struggled against each other for a moment, before the blue orb burst, throwing the boy and Saber backwards.

"Look," Naruto said calmly. "I don't know what I'm doing here, how I got here, or even where here is. But I don't want to hurt anyone here. Just let me leave peacefully."

Saber narrowed her eyes. Then, Shirou finally caught up, panting from trying to keep pace with a Servant.

"Wait, Saber!" Shirou shouted. "I think he's telling the truth. It doesn't seem like he's from around here. Do you have anywhere to stay?"

Naruto rubbed the back of his head and laughed nervously. "Of course I… don't. But I'll figure it out, don't worry about me."

"If you don't know where you're going to stay, you can stay here for now."

"Wow, really, thanks!"

Saber shook her head and sighed. "Shirou, you are far too trusting. But I won't question your decision."

Present...

"And he had this lightning technique he tried to skewer Archer with!" Rin finished explaining to Naruto.

"Some black fire too," Archer said.

Naruto slurped up a mouthful of noodles and nodded thoughtfully as he chewed. "Yeah, I know him," he said. "That's Sasuke. He's my best friend, but I doubt he'll listen to me right now. We both want peace, but he has some… interesting ideas on how to achieve that. I was trying to beat some sense into him when I ended up here. If he's here too, it might be something he did that sent us here."

"He seemed pretty strong," Rin commented.

"If that's all you saw, then Sasuke wasn't even close to taking you seriously," Naruto said seriously. "I'd suggest you stay away from him for now. I'll fight him if someone needs to."

Shirou gulped. "Taking on a Servant and he wasn't even serious?"

Saber nodded. "A difficult claim to believe. But if true, this 'Sasuke' may be the most dangerous opponent of the war. Even more so than Berserker."

Rin cupped her chin thoughtfully. "We need a plan before we can take him on again."

Sasuke and Avenger sat in their hotel room.

"I'm bored," Sasuke said. "I'm going out."

"It would be best to lay low to avoid fighting," Avenger suggested.

"I don't need to avoid it. Come it you want."

Sasuke stood and strode out of the room, Avenger trailing behind him shortly.