A\N: summary at the bottom

It was early morning in the Red Dragon Mansion. Issei was lying down on his King-size bed with a satisfied smile on his face. Why the smile?

Well right now, a lovely naked girl with long black hair was riding him in reverse cowgirl position, her tight little ass squeezing hard around his cock. Sweat dripped down her back, but this did nothing to slow her down. There was a nice desperation in her movements. Desperation for an orgam probably. While she rode him, she moaned constantly. He was getting close as well. Of course, only one of them would cum.

On his left, a naked blue haired girl was snuggling up against him. His left hand rested on her breasts. She had started to let her hair grow out ever since Issei mentioned he liked it better that way. It gave him a nice handle for when he was fucking her doggy-style. Since he was trying to get her pregnant, it seemed appropriate for her to assume a 'breeding position' every time they fucked.

With his other hand, he was fingering a blonde girl with big tits. She was still wearing a transparent green nightgown. Her G-string panties were hanging around one of her ankles.

Further down, a girl was licking and sucking on his toes. Probably Kiryuu, she had a huge foot fetish. But he couldn't be sure, because all the girls were eager to please him in any way they could. And some of them had stared with big eyes when they saw how much Issei enjoyed Kiryuu worshipping his feet.

Murayama and Katase were somewhere around here as well. Maybe still asleep? Or maybe they were masturbating while watching him.

The only missing girl was Rias. She still wasn't comfortable being around all the other girls. But hopefully that would improve after her little scene with Asia, which he had planned for the weekend. If that went well, she would probably join the other girls soon enough. And if she didn't, it would be time for some punishment. He had been very patient with her, but she should not forget that he was her Master.

For now, he had assigned Rias to protect the mansion and to oversee combat training. She mainly worked with Koneko and Kiba, since there was no risk of Issei coming in halfway through combat training to decide someone needed a break.

There was something about making a sweaty girl interrupt her combat training to fuck him that never failed to excite him. Probably the power trip. No matter how hard they trained, he could come in at any time and bend them over and they were completely powerless to-

"Please, Master," Akeno's begging pulled him back. "Cum in my ass."

"You're such a slut," he told her. "Getting off on anal."

"Ah. I'm sorry, Master. Please punish me. Ah."

"Remember," he told her. "No cumming without permission."

"I don't need to cum, Master," Akeno said. "Your cum is enough for me. Please let me enjoy your-"

"Hey," Xenovia protested. "Stop hogging him. He still needs to cum in my pussy."

"I'll get to it," Issei said.

"But it's been almost fifteen hours since you last came in my pussy. I'll never get pregnant like this. You promised me."

"I want your Come too," Asia cut in. "I've been praying all night to taste it. Can't you come in my mouth? Please? I need it."

"Hey, what about me?" Katase cut in from below. "I won't get stronger unless you cum in my pussy again."

"And I still need your cock between my tits," Murayama said.

"I'm good over here," Kiryuu said. She continued to play with his feet.

"Look, girls," Issei said. "I can't do you all at the same time. You need to wait your turns."

"Exactly," Akeno said. "It's my turn now."

"But when is my turn?" Xenovia said. "You're always fucking Akeno's ass."

"That's because my ass is nice and tight," Akeno said. "It can't compare to your loose pussy."

"Oh you want to fight?" Xenovia said.

"Oh please. You don't stand a chance."

Sparks jumped between Akeno's fingertips.

"We'll see about that," Xenovia shot back.

"No," Issei cut in. "No fighting."

"Yeah, stop fighting," Asia said. "Just ignore them, My Lord. These sinners don't deserve your glorious Cock. You should bless me with your Holy Seed instead."

"Stay out of this, you witch," Xenovia said.

"What did you call me?"

"Enough!" Issei thundered. "Out. All of you."

"But-"

"Everyone get out. Now."

Xenovia's shoulders dropped. "Fine."

"Thanks a lot, girls," Kiryuu said. "I didn't even do anything."

One by one, they walked out the door. The final girl closed the door, leaving Issei all alone in the large bed.

He sighed. This was getting out of hand. He really had to do something.

[You need to manage them,] Ddraig said.

Oh, you want me to fuck on schedule? Come on. I can't do that.

[Well you need to lay down some ground rules. It's not gonna work like this.]

I know. But how?

[Just make a schedule of who can sleep with you each night.]

I can't do that.

[Why not?]

Well I can't just rotate them. I have favorite girls. I'm not gonna wait a week to sleep with Asia again.

[So? I don't think anyone expects the schedules to be completely even. They just want to know where they stand.]

But if I do that, they'll keep competing to try and get a better position. It doesn't solve the jealousy issue. They'll fight dirty.

[Well what if someone else made the schedule? Someone neutral that they could not influence directly.]

But then I couldn't fuck that girl.

[Well there is one girl you're not fucking,] Ddraig pointed out.

Wait. Of course. Ddraig was right. There was one girl he had not fucked. The other kitten.

Koneko.

But first a shower.

Issei got out of bed and walked into his on-suite bathroom. He turned on the shower.

It would be weird to take a shower by himself. Usually he had at least one girl to help him wash up (using her breasts, obviously). And maybe another girl to take care of his hard-on.

Oh well. Maybe a little break would be good for him?

After a refreshing shower, Issei dried himself off and put on a black-grey training jersey. Then, he closed his eyes.

Rias?

[Issei? Is there anything you need?]

Where is Koneko right now?

[She's training at the gym. On the other side of the pool.]

Is she alone?

[Kiba is with her.]

Give him something to do. I need to talk with her alone.

[Okay.]

Issei walked downstairs. Asia was waiting in the kitchen. She was wearing a pink apron. Only an apron.

"Good morning," she said. "Would you like breakfast, My Lord?"

"Later. There is something I have to do first."

"As you wish." She bowed.

He walked outside.

Akeno was lying on a sunbed next to the pool. Topless, obviously.

"Hey, Ise. Would you like to rub some oil on me?"

"Another time," Issei told her. "I'm busy right now. Ask one of the other girls."

"Okay then." She looked disappointed, but did not complain.

He walked on, around the pool and into the building on the other side. The gym.

Koneko was there. She was wearing her training jersey and boxing gloves. Right now, she was punching a heavy black bag hanging from the ceiling on chains. Sweat dripped down from her face.

"Koneko?"

"What do you want?" She demanded without turning around.

"Now, now," Issei said. "That is no way to talk to your Master. Maybe Rias never punished you, but I will if you keep acting like that."

She paused for a moment. Then, she turned to him. "Do you want something from me… Senpai?" Her voice was subdued, but he still detected a subtle edge.

"Yes, I do," Issei said. "Have you noticed the girls are starting to get pretty competitive?"

"About what?" she asked.

"Well, you know." He pointed to his crotch.

"Oh. That. Yes I noticed. Why? Do you want me to act like that too?"

"No. I wouldn't want you to force yourself."

"Oh is that just for Rias-senpai?"

"Rias is very happy now. I gave her what she wanted. She just had trouble admitting it to herself."

Koneko sighed. "I know that."

"Then why did you help her?" Issei asked.

"Because I was worried about you too. About you changing. But I guess it's too late for that now."

"It's hard not to change when you have seven girls worshipping your cock."

"I guess so."

"Speaking about them. Things are getting out of hand. And I want your help."

She frowned. "My help?"

"Yes. I need you to manage them."

"What?"

"Yes. Make a schedule on when they can sleep with me, check which girls can pair up well together, listen to their problems,… You know, manage the harem. I'm not saying everything has to happen on schedule. But if the girls can ask you to plan a date with me for example, they might not be as needy as they are right now. If they ask me directly, the other girls will get jealous right away."

"Why me?" Koneko asked.

"Who else would I ask? You're the only one who's neutral here. You know, because you're not desperate to have my cock inside of you."

She didn't reply right away.

The silence stretched on.

What would he do if she said no? He couldn't think of anyone else to-

"Okay."

"What?"

"I accept. I will manage your harem."

"All right. Awesome."

"I'm just doing this because this way I can be certain you'll never try and fuck me. Even when… when I'm bigger." She blushed a little when she said it.

"Okay," Issei said.

"Well let's get started right away. I noticed you've been sporting a semi for a while now."

"Well I didn't cum this morning," Issei explained.

"I know. But all of the girls were there, so if I send any of them, it's clear favoritism. The others won't like that."

"Wait, how do you know-"

"You think girls don't talk to each other? Kiryuu was very hurt you sent her away even though she did nothing wrong."

"Damn. I'll have to apologise to her later."

"But first we have to take care of your… your cock. I'll send Rias here for some combat training. The others won't even notice."

"Good idea."

"Give her a good titty-fuck. She's getting jealous that you're always fucking Asia's breasts."

"Well that's why she grew them so big," Issei argued.

"Doesn't matter why. Rias is getting jealous. She thinks her breasts are her best asset."

"Hard to argue with that."

Koneko rolled her eyes and left the gym.

Hm. Well that turned out pretty well.

While he was waiting, he decided to train a little himself. He put on a pair of boxing gloves and started to hit the bag.

On the third hit, the chains snapped and the bag was sent flying against the wall.

Oops.

[Careful,] Ddraig said. [You are much stronger now.]

"Ise?"

He turned. "Ah, Rias."

She was wearing a training outfit.

"Already hard at work?" she asked.

"So are you."

"Well I think we could both use a break." She unzipped her jersey.

"Hm. Maybe you're right." He approached her. "But why are you wearing that?"

"Wearing what?"

"This." He touched her boobs over her pink sports bra.

"Well they are pretty big," she explained. "I need some support."

"You should be wearing sexy lingerie," he told her. Issei pulled her jersey off entirely.

"That would be very uncomfortable to practise in."

"Now, now. What is most important? Your comfort, or my viewing pleasure?"

He walked around her.

"But you don't come to watch every day," she argued.

"You should be ready anyway." He embraced her from behind and whispered in her ear: "You're mine, Rias. And I expect you to be ready to serve me at all times."

"I…"

His hand slipped below the waistband of her trousers and found her pussy.

"Damn, you're soaked."

"Ise, wait. Hold on. Stop."

"Stop is not your safeword, little Kitten." He lightly bit her ear.

"Fuck." Her legs began to shake. He always knew exactly what buttons to push.

"I think I'm giving you way too much freedom," he told her. "From now on, you will wear what I tell you to, when I tell you to. You're not changing outfits without asking me."

Rias began to moan.

"If you need to pee, you will pull your panties aside. They are not going below your thighs unless I give you permission. If I give you permission to wear panties at all."

Rias bit her lip.

She reached up and grabbed her sports bra.

"No," he told her. "Ask."

His thumb found her clit.

"Ah. Please."

"Ask me properly." He pinched her clit. That finally broke her resistance.

"Please, Master. Can your little kitty pull out her big tits and play with them?"

"Are you gonna be a good little kitty?"

"Yes, Master. I'll entertain you. You can watch me in the mirror." She pointed to the large mirror that was placed against the wall.

"And what about your outfits?" he asked her.

"I won't wear sports bras anymore."

"No, no," Issei said. "That's not what I said."

He pushed two fingers inside her pussy. They went inside easily.

"But… oh please. Not that. I'm not ready."

"Your pussy disagrees," he said. "Look how nice and wet it is."

He added a third finger. She yelped.

"What's wrong, Kitten?" he teased.

"I… I'm scared," she said.

"Of what I'll make you do?"

"Yes, Master."

"You don't trust me?"

"I do," she said. "But… If I give up control then… I…"

"You know you want to give it to me."

"I do… but… not yet. Please stop touching my slutty pussy, Master. If you keep going I will… ah…"

"Okay then."

He pulled out his hand and held it up to her face.

She took his fingers in her mouth and licked them clean.

"Thank you, Master," she said.

"Show me your gratitude."

She eagerly sucked on his fingers.

"With your tits," he clarified.

"You… You want a titty-fuck?"

He grabbed her breasts. "You know these are my favorites. And it's been far too long since I've last fucked them."

"I… I agree."

Rias turned around and pushed him back until he hit the wall.

She gave him a deep kiss. While she did this, her fingers eagerly pulled down his pants.

Rias began to trail down kisses. She sank to her knees as she went down.

Finally, she reached his cock. The outline was clear through his loose boxers.

She licked it through the fabric. Rias couldn't wait to feel him fuck her tits.

But first, she had to get it nice and wet.

Using his teeth, she pulled down his boxers. His big cock sprang free.

She better get it wet first.

Rias took a deep breath. Come on. She could do this. She had spent enough time training.

Her lips wrapped around his cock. She eagerly swirled her tongue around the head.

"That's enough," Issei told her. "Show me."

Rias took a deep breath.

A couple days ago, Issei had told her that her blowjob skills weren't adequate enough to suck his cock. She had been assigned to practise on a dildo in her bedroom.

It was pink and about as big as his cock. He had placed it on a mirror so she could watch herself suck. It was low, so she always had to suck on all fours. It was very humiliating.

Rias was ashamed to admit that every time she practised, she got so horny that afterwards, she would spin around and put the dildo in her pussy. Then, she would ride it to an earth-shattering climax. She was certain that he knew, but he hadn't told her yet. Maybe he was waiting to punish her later?

Anyway, he had been very clear that next time she wanted to suck him, she got one chance to take it all the way down her throat. Otherwise, she would be banished back to the dildo in the bedroom.

Rias steeled herself and pushed down. Slowly, his cock entered her throat.

Come on.

It slid down further.

She swallowed around the thick cock. Finally, it slipped down all the way. Her nose was touching his belly.

"Good girl," he told her. "I see your training paid off."

She smiled at him with teary eyes. She knew he wouldn't stop the dildo training. But now at least she got to suck his real cock too. And nothing beat the real thing.

"Now suck."

Rias eagerly started to suck him. She went balls-deep each time.

He placed his hand on her head and gently guided her pacing.

Eventually, she withdrew to catch her breath. Rias took a couple deep breaths. Then, she tried to get him back in, but he withdrew.

"I told you to give me a titfuck."

"Please? Just a bit more. I need to get it nice and wet for my tits."

"Ten seconds."

She quickly took him in her mouth again. Rias sucked him hard and deep. He counted down.

Come on.

Her head was bobbing down really fast. She was still gagging hard, but that would not stop her. There was no way she-

"Time."

Rias pulled off. His cock was glistening wet with her spit.

Issei waved his hand.

Using magic, he made a comfortable red armchair appear. Issei removed his boxers entirely and sat down in it. He spread his legs.

She knew what was expected of her.

Rias pulled off the sports bra, freeing her big tits. Then, she crawled forward and placed his cock between her tits.

"Get to work."

"Yes, Master."

She pushed her tits together and started to move up and down his cock.

Neither of them noticed the door of the gym was ajar. Nor did they notice the small girl watching them.

Koneko bit her lip.

She wasn't doing anything wrong. She had to watch him. It was her job to manage his harem. And for that she had to know what he liked and disliked. So it made… perfect sense… to…

Koneko took a deep breath. Stay calm.

Issei looked extremely relaxed. He was leaning back in his chair, looking down at Rias, who was working hard to please him. Her entire body moved up and down as she squeezed her big tits hard around his cock. Sweat was forming on her body.

Koneko reached up and touched her own breasts. There was no way she could do that to him. She was way too small.

And…

Koneko's hand wandered down into her panties. She inserted one finger in her pussy.

It was really tight. There was no way she'd be able to take that massive cock of his. He'd tear her apart.

She had never had anything bigger than a finger in her pussy, and even that was rare. When she played with herself, which didn't happen often, she would usually just rub her clit until she came. And as a Nekomata, she did not get her period, so no tampons either. Nekomata had a different system. Instead of a monthly cycle, they would become fertile only when a suitable mate was found. However, when this happened, they got 'in heat', which made them extremely horny and-

"Fuck," Issei said. "Keep going. I'm gonna cum all over you."

Rias redoubled her efforts.

Koneko watched them, completely mesmerised.

He wasn't lying. He did cum all over her. Rias was just in time to close her eyes before the strong jets of cum hit her face. They even got over her forehead and into her hair.

Then, the force lessened and Issei covered her large chest as well.

If he came inside her, she might get pregnant right away.

Rias licked her lips to get some of his cum into her mouth. While she enjoyed the taste, she squeezed out the remnants of cum with her tits.

"Thank you, Master," she said.

"My pleasure," Issei sighed.

"I'm gonna need a shower."

"Hold on," he said. "I gotta take a picture of this beautiful work of art."

"Issei," she complained.

He pulled out his phone. "Give me a smile. This is for my collection."

"Pervert," she said, but she still did as he asked.

The camera shutter clicked. When he was satisfied with the pictures, Rias cleaned herself up with a tissue. Then, she got dressed again. She hesitated for a moment when she picked up her sports bra.

"Something wrong?" Issei asked.

"No. Of course not." Rias put on the sports bra.

Rias wondered how long she'd still be allowed to pick her own clothes. Probably not much longer. She knew his tactics. He would plant an idea, she would resist and he'd back off. But then, the idea kept wandering around in her mind, until eventually, she asked him to do it.

"You know I'm gonna make you beg for it, right?" he said, as if reading her mind.

"I know. That's what I'm hoping for."

"Good."

Rias left the room. He stared at her butt as she walked outside.

Summary: Issei is having fun with his harem. However, they start to fight with each other. He decides he needs someone to manage his harem. He asks Koneko and she agrees. Then, Rias gives him a titfuck in the gym. Koneko is secretly watching them.