Mitsuru was right, you aren't dreaming!
She's real, in the flesh, the genuine article. Rias Gremory is following you around like a lost puppy. You left the gun in the lab and decided to ask her a few questions while Mitsuru experimented with that rock she stole from the golem's body. Rias clamped herself onto your left arm and refuses to let go. The feeling of her large, perfect breasts against your arm is distracting to say the least. You know how liberal Rias can be with her sexuality with someone she likes.
But that begs the question, what about Issei? He's her primary romantic interest after all. From what you could gather from Mitsuru's rushed explanation – she's meant to be in love with you based on your appearances in an anime franchise much like her own. "So, I'm the main character in a TV show?"
Rias nods and smiles, "You and Mitsuru, I loved watching you in the mornings. You're exactly what I expected! I suppose it makes sense given that you're the real thing."
You sigh, "You're from an anime series too, Rias. That's why Mitsuru got the idea of summoning you in the first place."
"Interesting."
"So in the anime from your world, who do we summon first? I don't imagine it's you given that it'd mean you have a doppelganger on TV."
"The anime is produced by Kadogawa. There are a lot of crossovers with popular franchises that they own! The first girl you summoned was Jane Hellrigel from the manga Kanojo Senki." You've never heard of this character or her manga. You suppose it makes some kind of messed up sense that the fictional world has fictional media to go along with it, although in this case Rias' world is no less fictional than your own.
"Can't say I've heard of her."
Rias quirks her brow, "Really? The light novel is very popular at my school…"
"I have another question; do you know an Issei?"
"Hm. Issei-kun? He's my precious pawn."
Issei does exist in her world, and he's a part of her devil family too. Rias doesn't seem to have any misgivings about getting all cosy with you. Asking the follow-up questions feels just a little too personal for the time being, so you leave things be. You'll learn more soon enough if you spend enough time with her.
Rias stops in place, pointing to a building, "Oh, let's go there!"
You follow the outstretched digit until you come across the location of interest, which just so happens to be a love hotel. The seedy signage and the location tells you everything you need to know, you turn back to the girl and scowl, "Uh, Rias, that's a love hotel."
She smirks, "I know."
"Let me get this straight, you want me to go to the love hotel with you, and for reasons I'm not going to speak out loud."
"Yes."
"You barely even know me."
Rias pouts, "I know everything about you! I even read the prequel manga that everyone hates, just so I could get to know you and Mitsuru better! And in the anime you sleep with your summoned harem whenever you get the chance."
"Rias, this isn't an anime! And how the hell did they get away with showing that on TV?" Your words betray the immense desire you feel to do exactly what she says at this exact moment. Rias is every bit as smoking hot as she's implied to be in the anime and novels. Big breasts, sexy thighs, and a flawless face. If you weren't so hesitant to take advantage of someone else you'd have agreed on the spot.
Rias knows this. Her hand sneaks down and plants itself firmly on the front of your pants, where the suggestion of spending the evening with her in a shitty motel has stirred some life into your dormant friend. "Consider it my payment for helping you," she winks.
"But again, a dirty love hotel?"
Rias is clearly excited by the idea, "I don't mind, it's always been a fantasy of mine for you to take me somewhere less reputable."
You sigh, "Rias, I don't think they'll let us book a room anyway – you're still wearing your uniform. What kind of message would that send?" Rias tugs on her school blazer with a frown, as if she hadn't considered it before you pointed it out to her. Her eyes light up with a wicked glint. She holds up one of her hands and snaps her fingers. A red circle appears under your feet and you find yourself whisked away to an unknown destination.
When you finally get your bearings again, you find yourself stood inside of your own crappy apartment. You spend most of your time down at the lab. You've never had enough time to decorate the place properly. All you have is some basic furniture, bare walls and a spare potted plant you stole from the lab's abandoned office space. Rias dances around the space with incredible grace, oo-ing and ah-ing at what is an incredibly mundane space.
"Is it really that exciting?" you ask, tucking your erection under your waistband as Rias bends over and flashes you with a pair of sexy panties.
"I never thought I'd get to come into your home for real," Rias smiles, "It's exactly like the anime."
"That's how you knew you could teleport us here…"
She winks at you and sticks her tongue out teasingly. Rias whisks you away to your small bedroom. You bought a cheap king-sized bed from a second-hand store. You never once thought that a real flesh and blood girl would want to get in it with you. It's for that reason that your sheets are still messed up from when you awoke this morning. In fact, the room is a bit of a mess at the moment.
"You have a lot of spare space in here," Rias ponders, "Maybe this could be a cosy little hideout for all of your harem members. I can recommend some amazing interior decorators…"
"Rias, you saved my ass. I'm not going to ask you to pay out of pocket to decorate the apartment I don't spend any time in."
"You don't spend any time here because it's like this," Rias reasons, "Don't you want to have a place of your own?" Risk flops down onto your bed, giving you another tantalizing view of her thighs and lace covered panties. She notices the direction of your gaze and quickly takes advantage, pulling up her skirt and tilting her hips to the side. You avert your gaze to the wall and try not to let her get to you. Why did Mitsuru have to select such a confident girl to be your first summon? She's running rings around you.
You wait, and wait – but Rias does not speak to you again until you return your gaze to her, whereupon you discover that she is completely topless. Her shirt, blazer and bra have been nearly piled at the end of your bed. Rias doesn't seem perturbed by her nudity, but why would she? She's a shameless exhibitionist.
"You can touch them all you like, cutie," she assures you. She reaches out and grabs your hands, forcing you to plant them firmly on her breasts. For that brief moment you feel the forbidden door finally opening – a real pair of boobs, and not just any pair of boobs, Rias Gremory's huge, perfect, perky boobs. The softness knocks you flat. You find yourself squeezing into the flesh for a moment before quickly backing away with a fierce blush on your cheeks.
"Woah! You can't just spring that on a guy!"
You have to admit that Rias is one of your dream girls. To mirror what Mitsuru said in regard to their relationship to you, she's pretty good waifu material. That teasing, onee-san personality combined with her blatant disregard for being naked in front of other people is one of her key traits. But you can't help but feel weird about it regardless. You feel like you're taking advantage of her, she saved your life, and now she's trying to sleep with you. You wouldn't sleep with you if you were paid to do it!
Rias closes her eyes, "Do you have a problem with me wishing to sleep with you? A precious first time from a girl like me is worth a lot of money, you know?"
"I feel like I'm taking advantage of you."
Rias shrugs, before folding her pale arms under her large breasts, "You're not taking advantage of me. I could smite you where you stand at a moment's notice."
"But we summoned you because you're in love with me. Doesn't that feel strange to you?"
"I don't see why it would be. I'm being presented with a once in a lifetime opportunity, and so are you. I never would have dreamt that I could get to know you, or even be… romantically involved with you… It's amazing really. Like we were meant for each other." Rias' confidence falters for just a moment, betraying her true feelings on the matter. This isn't her usual trick of teasing people, she genuinely feels something about you.
"For me? Or that fictional version of me?"
"You're the same, even down to asking this type of question. You're too considerate sometimes. I guess that's why so many girls fell in love with you. Now, let's stop all this worrying and get to the main event!"
Your clothes explode from your body as a powerful magical force tears them stitch from stitch. Suddenly you're more naked than Rias is, and she's only wearing her panties. Not for long though, she lifts up her legs and whips them away like a rubber band into the pile at the end of the bed, revealing her perfect slit and a light dusting of vibrant red pubic hair. "Fine, I'll do this for you, if you really want it," you concede.
Rias eyes your body with the look of a hungry predator. You aren't in peak shape - but you do get a lot of physical activity from being forced to run around for Mitsuru. You return the favour and enjoy Rias' nude body for yourself. She's all curves from top to bottom. Her well-toned body is tight all over, giving her an idealized appearance especially when combined with her perfect chest and wide hips. She's every teenager's horny wet dream, which was probably the point when they designed her.
You clamber over onto the bed and find yourself pressed into the valley between her tits also immediately. She runs her hands through your hair as her warm skin presses against your face. It's hard to stop yourself from becoming fully engorged as she speaks whispered words of encouragement, "Just relax and let me take care of you. It will feel amazing."
Rias snaps her fingers again. You feel her hand drift down to your member and stroke it from base to tip with her finger, she then places something over the top and pulls it down. She must have summoned a rubber from thin air, what a way to use her magic. With your little friend safely wrapped up, and Rias free from the risk of any surprise pregnancies, you feel a little more confident in playing with her body.
You reach out and touch her chest again, running over her cute nipples with your thumbs and squeezing the bountiful flesh. Rias blushes and enjoys the feeling of your hands on her body, "Do you like them?"
"How could I not?" You lean down and take one of her nipples into her mouth, sucking on it and attacking it with your tongue.
"Ah!" Rias moans. "I don't lactate!" she insists, "That will have to wait until our first child."
"First? Child?"
Rias blushes, "Don't look at me like that." To punish you for your crimes, she drags you down onto the bed and clambers over top of you. "You're so cute," she gushes. From below you really see just how large her breasts are. Now fulfilling a shared fantasy together – you realize that maybe there's something to Mitsurus's statements about their affection for you. Rias wastes little time in positioning your hard member at the entrance to her pussy.
"Are you prepared?"
"No, but go ahead."
Rias presses the tip of your member against her tightly clasped lips, slowly sliding down until your crotches meet. You feel something block your path for a moment, before pushing forwards as deep as you can go. You give her a moment to adjust to the feeling of your cock inside of her. The faint resistance offered by her hymen – she hadn't even gone so far as to pleasure herself. Rias is a tough girl, so she airs no complaints, nor does she bleed.
"Ah, you feel amazing," she gasps. You have to share the sentiment, she's tight and wet. You have to stop yourself from thrusting up inside of her before she's ready. You allow Rias to dictate her own pace, she slowly lifts her hips up and falling back down onto your hips. Each rise and fall cause her perfect tits to jiggle and bounce. You reach up and grab them both in the palm of your hands as Rias finds a comfortable rhythm.
The room is soon filled with the sound of flesh meeting flesh. There is no more room for teasing or flirting. You both find comfort in each other's bodies, intermingling and coming together. Your skin is covered with sweat, you can feel needles poking at your back. The warmth and softness of her body is incredible, you want to hold onto her forever.
Rias' incredible stamina and strength, enhanced by her devilish nature ensure that she will not tire so easily like your own mortal flesh. Her face is flushed red like her crimson hair. With each push of her body you delve deeper and deeper into her welcoming folds. "Ah, ah! That's it cutie, just keep hitting me right there!" Despite her words of encouragement, you're very much along for the ride. Her wild passion inflames your own. Your hands roam her body, groping and exploring as much as you can.
There was never much prospect of you both lasting long, the hot and heavy breeding brought on in a spur of the moment is rapidly bringing you to the edge. Each movement brings you closer and closer to sweet oblivion, and as she begins to speed up again after a short respite you feel yourself cross the point of no return. Your own hips slam upwards as you lose control of your own body, only serving to heighten Rias' pleasure as you mercilessly pound her sensitive inner-walls. The heat, smell and sounds are too much. Rias' nails dig into your back as her movements become erratic and haphazard.
You both reach a shared orgasm. You cum into the condom, filling it to the brim in the process. Rias cries out and slams down one last time, reaching a shuddering climax, before leaning down and pulling you into a messy, tongue filled kiss. The high of your first time gives way to a deep sense of intimacy. Rias hugs you, her breasts pushing against your chest as you take a moment to catch your breath. The stench of sex hangs heavy in the air.
You intermingle your fingers with her and enjoy the afterglow on screwed up sheets. Rias closes her eyes and smiles. "I never thought I'd get to do this, thank you."
"Why are you thanking me? You could have your pick of every man on earth if you wanted."
"But I wanted you," she insists again. She reaches out and pokes your nose with the tip of her finger, "We have to do this again. I don't think that was enough for me." You notice the blood under her nails and realize that she raked the hell out of your back. The endorphin high you're experiencing numbs the pain.
Rias rolls out of bed and slips on her t-shirt. The sweat on your body is cooling down now, sending a deep chill through you. "May I use your shower?" she asks.
"Sure."
Rias disappears into your en-suite bathroom, which sounds much more luxurious than it really is. A second later you hear the sound of running water. As fun as getting in with her would seem, there's seldom enough space for you on your own, never mind a girl with a gifted chest as well. You still can't quite believe what just happened. You had your first time with a girl who yesterday was nothing more than the figment of a horny writer's imagination.
You decide to make yourself somewhat decent before she comes back. You reequip your pants and sit back on the bed while she finished up. Rias emerges ten minutes later, looking all the better for the effort. She smiles at you reassuringly. "I really should be getting back before my club members worry about me," Rias explains, "But how?" She sets about the task of finding her discarded clothes and redressing herself. The shellshock from sleeping with her still hasn't worn off on you. You pull out your phone and send Mitsuru a message, even though the sun has set you can guarantee she'll be in the lab still. She replies soon after with an affirmative emoji.
"Mitsuru is going to change the hammer back to normal, that should send you home – and according to this only a few seconds will have passed over there, something about your home being on the edge of the multiverse? I really wish she'd explain this stuff properly."
Before she disappears back into her trading card prison, Rias bends down and kisses you on the cheek, "Don't feel so bad, you're my cute little summoner after all." Her hands cup your cheeks and run through your hair in an affectionate and sisterly way, much like she did to Issei in their anime. Rias is always eager to shower people with affection and words of reassurance after all.
You nod, "I'll try not to get worked up about it, but then I think about all the other women Mitsuru is going to force onto me at the same time."
Rias giggles, "I know you can handle us. Koneko, Asia and Akeno might be interested in joining me."
"I know for sure I wouldn't be able to handle that," you blush, remembering their respective personalities and… interests. Your already drained member twitches slightly at the implication regardless, "I could ask Mitsuru to make a card for them too."
Before you can converse on the matter any further, Rias' body starts to glow and break apart into triangular fragments, that float into the air and disappear, "Looks like I'm going home."
"Thanks again for saving me."
"It was my pleasure, love you!" Rias blows you a final kiss before fading away fully, leaving you alone with your thoughts and dirtied bedsheets.
"I just banged Rias Gremory," you state aloud. Even having lived it, it doesn't feel real. You fall back onto the bed and stare at the ceiling.
What are you going to say to Mitsuru?