Prompt: head in the clouds
"If there's anything I can do to welcome you to Fuyuki City, please let me know," Issei said.
"That will not be necessary," Saber answered. "But thank you."
"It's no problem," he replied. "And let me know if Emiya gives you any trouble. He has his heart in the right place, but he doesn't do well around women. …Th-though I suppose I'm not one to talk…" he added under his breath, without taking his enraptured gaze away from Saber's face.
Shirou raised an eyebrow. "What was that last bit?"
Issei blinked and quickly said, "I didn't say anything. Ah, Saber, that's another thing. Please take care of Emiya for me. He doesn't care about himself, so someone else has to look after him."
"I will," she solemnly swore.
He gave her a small smile rarely seen by anyone other than Shirou or his family members. "Good. I trust you."
"And in return, will you assist him when he is at school?" Saber asked. "I cannot accompany him there."
He nodded without even having to think about it. "If he ever comes back to school, that is," he added with a quiet laugh.
Shirou chuckled. "You know, Issei, it's weird how well you're getting along with Saber. You don't usually like girls."
"…That's true, but… Saber isn't just any girl. Kiritsugu had good taste," Issei declared. Then he frowned. "No, that was a bad way to phrase that. I don't want to think about him in that light… Especially considering how young Saber would have had to be at the time…"
"Me neither," Shirou agreed, making a disturbed expression.
Saber tilted her head and asked, "What are you two talking about?"