Participants: Shirou & Illyasviel

"You'll come over again, won't you, Shirou?" Illya asked him at the castle's entrance.

"Yeah. I'll try to drop again whenever I-"

Shirou's words drifted off as he felt Sella's eyes burn holes into him. The maid wanted him gone, preferably forever. After all the lewd acts she and Leysritt had performed with him, she wanted Shirou to disappear before he could sink his claws into her master.

Little did she know, she was already too late.

It was on the very first night Shirou had stayed at Einzbern Castle, only moments after he and Sella had fucked. Seeing how sweaty he was, Shirou figured taking another shower before midnight would be a good idea. What he was not expecting was meeting Illya there.

"Illya?"

"Shirou..."

The young master of Einzbern was already washing herself in the pool she and her maids called a bathtub.

"S-sorry..." Shirou said while turning to go out.

"Wait."

He did. Then he heard a splash and some wet footsteps. Illya pressed her hands and tiny chest against Shirou's back.

"There's plenty of room left, onii-chan. You can come in too..."

From her tone, Shirou knew she was not just handing out a platonic invitation. Her could already feel her erect nipples through his shirt. With a deep breath, he undressed and entered the bathtub with Illya.

He tried to relax himself, but Illya was doing her damndest to make that impossible for him by sitting on his lap.

"You know, Illya... there's plenty of other room for you to sit."

"But this place is the most comfortable place," she said while slowly grinding against Shirou's manhood.

Comfortable was not a word Shirou would use to describe the current situation. As pitiful as his willpower was, he could already feel his rod rising, and he knew Illya could too. At first, he assumed that was why she finally rose from his lap, but then she leaned forward; giving him a primetime view of her ass and pussy, all so she could pick up some soap.

Keeping his lower member under control was proving itself a Olympian challenge. Especially when Illya sat in his lap again... facing him.

"I-Illya! You really-"

"Need to be cleaned? I think so too, Onii-chan~" She rubbed the soap all over herself until her little body was full of suds. "...There are some places I can't reach. ...You'll help won't you?"

That was it. The dam had burst. Shirou no longer had the strength to care.

"Yeah... I'll help you."

Shirou took the soap and scrubbed his hands with it before casting it further into the bathtub. Like a masseuse, he rubbed Illyasviel down with his soapy palms. He balmed her chest, making sure to tease the nipples she had tortured him with earlier. Then he moved on to her hips, which surprised him with their girth. Illya didn't have a body like Sakura or Leysritt, but the lower part of her was remarkably shapely.

Her hips were a bit wider for a girl her height, her thighs were unusually scrumptious looking and her ass wasn't plump like Saber's, but it was very round and comely.

'Maybe Illya isn't bluffing when she says she'll have a better body than Sakura and Rider one day,' Shirou thought.

If so, he looked forward to the day. For now, however...

xXx Lemon Start! xXx

"Awaah~ Onii-chan~"

Illya's moans echoed throughout the bath(pool) as Shirou propelled his dick into her. She leaned back, using her arms for support while she was fucked diagonally. Water splashed about as the little girl's pussy was punished by her big(?) brother's cock.

"This..is what...you get...for always...being...a damn...tease!" Shirou scolded her in-between pumps.

"Yah~ Hah~ Scold me-Mah~ ...more, Onii-chan~"

Shirou clenched her cute little booty while driving his dick up into her. When he felt the climax coming, he stood from the bath; one hand on her ass and the other holding her back. Illya's arms and head drooped as her Onii-chan fucked her like a ragdoll.

And then he came.

"Myaaaaaah~"

Illya's final scream echoed so much, Shirou wondered if Sella and Liz had heard it. Most of his cum had already been pumped into the former, so he hadn't completely creamed inside of his sister.

The bath was pretty much ruined, though.

"Hah... It's fine. I think we're clean enough..." Illya said, half-dazed.

Shirou scratched his head while recalling the memory. What a steamy bath that had been.

"Ah! Shirou, we never got to finish our game either!" Illya exclaimed. "Next time you come over, we have to play again."

"Oh, yeah... The game..."

They had played the "game" yesterday, when Shirou arrived in Illya's room right after fucking Sella and Liz. His time with the maids had caused him to be over half an hour late.

"What took you so long, Shirou?! Do you know how long I've been waiting here? I should get Berserker to crush you!"

"Please don't. I'm really sorry, Illya. I was just... busy for a few minutes."

"Hmph!" After a few seconds of the silent treatment, Illya said "I'll forgive you if you play a game with me."

"Yeah, sure. Just show me the Dreamcast, and I'll-"

"Not that game..."

Illya smiled and tugged up her skirt. Shirou stared at the white panties she revealed. While his eyes were locked on, the master of Einzbern reached out and touched his crotch. She then rubbed it until a nice, hard bulge was under her palm.

"Let's play: Whoever Cums First..."

xXx Lemon[pt II] Start! xXx

It was very simple game:

Illya would lay over Shirou and suck him off, while Shirou would lay under her and lick her down. Whomever came first was the loser.

It was shocking to Shirou how good Illya was at this game. Even though he had already came thrice in the dining room, the way Illya was blowing him, he would shoot another load into her mouth in no time. No only did she take the entire thing down her little throat, she put her tongue underneath the shaft while she swallowed.

"Mnmh~ Mmh~ Uhm~"

Her mouth alone was equal to the "double-blowjob titty-fuck" Shirou had received from Sella and Liz.

'Why is she so good at this...?' he wondered while sucking on her clit.

He fingered her asshole to gain an edge.

"Ohni-chwan wats wheating!" Illya complained with her mouthful (which actually felt really good).

"Sorry, Illya, but there's no way I'm gonna to lose this one!"

'Not after I already came three times..'

Illya's head bobbed up and down furiously while Shirou slithered his tongue as deep into her small vag as he could. For the fourth time that hour, he came, and his little(?) sister came with him, spraying vaginal fluids all over his face.

"...A tie, huh?" Shirou said while licking up some of Illya's pussy juice.

"Shirou... Why do you always cum so little? Are you eating the right foods everyday?"

Shirou didn't answer her. Instead, he played with her ass again.

"Ah~ Onii-chan, quit it!"

Another odd memory for Shirou before he left.

"Milady, I think Shirou Emiya should hurry and be on his way," Sella advised(demanded.)

"Say bye-bye to Illya, Shirou," added Liz.

"He already did, Liz. Earlier when Onii-chan and I went for a walk in the courtyard, we gave each other plenty of good-byes."

Liz looked at Shirou percurliary. "Did you?"

"Well..."

It depends on what you defined as goodbye.

It was earlier that morning. Under the shade of a tree, in a garden of beautiful flowers, Illya was bobbing her bare, white ass up and down; gesturing with her finger for Shirou to "Come and get it."

Her panties were pulled to one ankle and her skirt was laying beside her. Was there honestly anything Shirou could have done besides "Going to get it?"

xXx Lemon[pt III] Start! xXx

"Ah~"

Shirou held onto her nice hips while he penetrated her. Her cute ass quivered with each "Pat! Pat!" that resounded throughout the courtyard. Maybe it was just her size, but Illya's pussy was the tightest one Shirou had ever fucked. She was tightest it had ever been that morning - maybe because they were doing it outside?

"Hah~ Hah~ Onii-chan... Doing it outside is the best~ Ah~ Nah~"

She got even tighter. Shirou could barely move around inside her now, the way she was coiling around him.

"Illya... I'm cumming!"

"Ah~ I'm cumming too, Onii-chan~"

He stood Illya up and forced her against a tree. Even on her tip-toes, he had to crouch to do her. Her adorable bottom shook madly as Shirou fucked her like a dog.

With a final thrust, he came. And this time, he was running on a full tank. All of his cum for that day was fired into Illya's tiny snatch, and from the way she drooled, Shirou knew she could tell the difference. One of her legs rose as her onii-chan's hot cum filled her up.

"Eyaaaaahn~ Onii-chan... Your cum... It's so..."

Shirou let her down gently on the flowers, his cum fresh, hot cum leaking down her thigh like a river.

Such a weird way to say goodbye.

"Well, I'll be going then," Shirou said while shaking the memory away.

The maids both bowed at their leaving guest while their master gave a curtsey. Opening the door, Shirou glanced back once and saw Illyasviel lick her lips. The image stayed with him while he walked through the forest.

He had a very interesting stay at Einzbern Castle.