Amusement

Shirou's face went red. She showed a sexy lady like Rider his cock and she chuckled. This was the first time he had shown anyone his dick and the reaction was exactly what he anticipated. Humiliation. Laughter.

Luckily, Rider had a little more class than openly mocking him. She giggled, her pleasant pink lips twirling as if she was looking at something mildly amusing.

"...I need to borrow your bike to pick things up for dinner. Is that alright with you?"

She managed to maintain eye contact. It was as though she was entirely uninterested in his manhood. Like it was too small for her to concern herself over.

God, he hated himself. Shirou nodded and stammered out, "Y-yeah, no problem."

There was an impasse. Rider staring at the redhead while he covered his erection. It wasn't a difficult task which was the precise problem. His hands were big enough to cover every hint of his manhood, balls and cock and all. Rider's luscious eyes flickered once. She certainly wasn't impressed. There was a glitter of something, however, an emotion Shirou couldn't quite put his finger on. Rider turned to leave but before she stepped the room said, "Don't worry, Shinji had already told me about your...size. I'm sure Sakura won't mind."

"S-Sakura? What do you--" Shirou stopped himself. His ears were on fire. "F-fine, just close the door please."

"Of course, Shirou."

Rider gently closed the door, although not without winking. Shirou swore she laughed as she walked off. Out of all the women he knew, Rider was the last person he wanted to see his microscopic endowment. He could never read her, which meant he couldn't tell if his size was a good or bad thing. With Sakura, he knew he would get a physical reaction. Her face would lit up or fall. Saber, on the other hand, would either say it as it was or try to be nice about it. They were all easy to understand. Not like Rider.

His cock was throbbing. A little pre-cum leaked from the equally little tip. Shit, did I got horny?