The two busty babes walked together into the mansion's basement, where they found a massive room the size of gymnasium and with matted floors and walls just like one. Plenty of room for them to roll around while coated in oil from head to toe. Akeno looked around and saw two ropes next to each other, hanging from the ceiling. She put two and two together, realizing that the girls would pull the ropes and oil would shower over both of them. She gave Rias a sultry grin.
"Any rules for this particular event?" Akeno asked.
"Once we're nice and lubed up, we sex wrestle." Rias explained. "We both try to pin the other down and sexually dominate our opponent. I got this idea from a porn movie series that Issei and I love to watch. I love to tease him about reenacting it with the other girls."
"Well, now his fantasy will be at least partially fulfilled." Akeno said. "Maybe sometime we can invite Asia and the others here to give him a real show."
"I like the way you think, babe." Rias teased. "But for now, let's get to it."
The sex rivals each went under a rope, Akeno to the left, Rias to the right. At the same time, they pulled on their ropes, opening a panel in the ceiling and raining oil down on their heads, the thick viscous liquid poured down slowly, like syrup being poured from a bottle and doused the girls. They shrieked, cooed and giggled from the cool liquid enveloping them, giving them goosebumps and hardening their nipples. They moved around a bit to make sure, that every inch of their voluptuous bodies was coated in the substance. Finally, the oil stopped pouring, leaving them completely drenched, their hair matted to their backs, their skin gleaming from the glare of the lights and their nipples hard and pointed from the coolness.
They looked at each other longingly, approaching until their nipples gently collided, making them both close their eyes and grunt in pleasure. Rias snapped her fingers in placement of a bell and the two brought their faces closer together until their noses touched and their full lips were within inches of each other. Akeno reached her hand into Rias's oil soaked red locks and Rias did the same to Akeno's equally drenched black hair. They stared each other down for a few more seconds before Rias whipped her tongue out and slashed it across Akeno's lips. Akeno giggled and licked Rias's lips in return. They kept this up for a bit before their tongues finally entangled together. The girls lustfully tongue clashed before enclosing their mouths together for a passionate kissing session. They closed their eyes in pleasure as they lovingly made out for at least five minutes, their saliva dripping down into their colliding cleavages.
Rias broke the kiss, leaving Akeno with her mouth open and tongue out, wanting more before the redhead pushed her rival onto the matted floor and got on top of her, licking and suckling the raven's right nipple, her left hand pinching and pulling at Akeno's left nipple while her right hand was fingering Akeno's ripe pussy. Akeno moaned loudly, realizing that Rias has come a long way since their encounter in the bath on her and Issei's anniversary. She pulled her rival's hair to try and get her to stop suckling her breasts but Rias was firmly locked on, biting down, making Akeno scream. Rias knew that Akeno liked it rough and took complete advantage of that.
Rias unclamped her mouth from Akeno's tits and lowered her head to go down on her best friend and sexual rival. She didn't even bother with teasing as he tongue dove straight into Akeno's cunt, slurping the inside of her labia, licking her clit like a lollipop while her hands were up higher fondling Akeno's udders. The raven built up enough energy to wrap her legs around Rias's head. She then got up, throwing Rias to the floor on her back, basically sitting on her face. Rias's tongue was still inside of her, so she turned herself around and lowered down to start licking Rias's pussy, making it a 69.
The girls continued to lap at each other's pussies but since Rias had gone down on Akeno first, Akeno was the first to cum, squirting all over Rias's face and hair. About 30 seconds later, Riad also came, drenching Akeno in her juices. The girls got up and tried to catch their breath after that pussy munching marathon. After regaining their energy, this time, Akeno struck first, rushing behind Rias, wrapping her limbs around her rival's to trap her while she assaulted the redhead's entrance and rammed her tongue into Rias's mouth to entrap her further. Rias struggled to get out of this arrangement but couldn't. She was still too exhausted from the 69 battle. Rias knew why. Since Akeno came first, she also regained her energy first. It made perfect sense. She cursed herself for not preparing for that or she would have if her mouth wasn't full of Akeno's tongue.
Akeno stuck all five fingers inside her rival as her tongue relentlessly assaulted Rias's mouth. Rias knew she couldn't take much more of this but there was no way out. Her limbs were trapped by Akeno's, her pussy and mouth were being dominated. She accepted the inevitable. Still, Akeno was wise enough not to let her guard down to allow Rias to counterattack. After five minutes of this, Rias came yet again, squirting pussy juice everywhere like a fire hose. Akeno finally let her go as Rias fell to the ground in exhaustion but her rival wasn't done yet. Akeno sat on Rias's back, pulled her red hair, causing her to get back up only for Akeno to grab her boobs from behind. The raven fondled and bounced her best friend's jubblies, pinching her nipples and slapping them like squishy rubber balls.
Rias moaned out loud as her breasts were played with and her hair was pulled. Akeno was always a relentless, dominant lover but this was something else entirely. Akeno, still not letting go of Rias's hair, got in front of her rival and began suckling at her breasts, likely as revenge for Rias doing it to her at the start of the match. She enjoyed the taste of the redhead's nipples as she listfully licked, sucked and bit at them. Rias could take no more and collapsed as Akeno continued to dominate her and lowered her head to go down on Rias. The redhead then made a small grin, realizing that her rival fell for it hook, line and sinker. She did the same thing Akeno did to her earlier, wrapped her legs around her rival's head and used it as leverage to get on top. Akeno was so sure that the match was over that she never saw it coming.
Rias sat on Akeno's face and brought her hands back to finger her from behind until she saw her rival close her eyes in pleasure, realizing that now was the time for Rias to turn around and go down on the raven. She launched a full on assault on Akeno's pussy, licking, sucking, fingering, biting and even fisting it. Akeno was overwhelmed and too tired to eat Rias's pussy back with the same amount of vigor. She was so ripe down there that Rias just made her cum again and again and again, soaking the matted floors in her juices. Akeno could take no more and tapped out, surrendering the match to Rias. Rias threw her arms up in celebration before she too collapsed on top of Akeno. The two beauties kissed as they rested on each other.
"I dunno about you, babe, but I could use a break and some washing up." Akeno said.
"Same. Let's relax in the hot tub for a bit and then call it a day." Rias agreed.