Let Rias ride him!

"So then, what exactly are your terms?" he asked Akeno as he turned to face the three girls, and noticed Rias and Asia starting to undress. He held up a hand, stopping them, before patting them both.

"Oh, I like where this is going," Rias grinned, casually standing with arms akimbo. Akeno didn't answer immediately, taking a moment to consider how to word her requests.

Issei returned the grin, raising his draconic hand and snapped the clawed fingers. "Dress Break," he intoned casually, causing their clothes to burst off their body, getting a small eep from Asia. "Never get tired of that," Issei smirked. He then undid his pants, marveling at how the wish Kiba suggested helped him avoid accidentally tearing them. Once he had his erection free, he laid on the bed, beckoning Rias to join him.

"Of course, Master..." Rias crooned, grasping his cock as she straddled his hips. She lowered her hips as she guided his manhood into her folds. "Mmmnh~!" Once she was properly impaled, she placed her hands on his chest, and began to grind her pelvis against his.

"Right, now that you've got your multitasking going..." Akeno giggled in amusement as she watched Rias and Issei go at it. "We should bring up the fact that I am a sadist..."

"And I'm not much of a masochist," Issei moaned, gripping Rias's hips. "But... I think we can make it work..."

"Oh, definitely! For starters, I would like a position above Asia and Rias in the harem. Basically a dominatrix role," Akeno nodded, playing with her own breasts as Asia flushed a deep red.

"While I'm not against that..." Issei panted, bucking his hips up into Rias. "I would insist on Asia having a safe word..."

"Yes, please!" Asia agreed, nodding a bit in gratitude as Issei moved his hands up, sliding them along Rias's abdomen and torso, cupping them in his hands. Rias bit her lip, pressing her chest into his hands.

"Mmmn... those scales are a bit abrasive, but not too much... In fact, they're very stimulating..." Rias moaned out at Issei's actions. Issei made a mental note of that.

Akneo giggled a bit. "Safe words are for pussies," she joked. "But in all seriousness, that's fair enough, I won't be against one. Asia is still a bit naive to the hardcore stuff after all, better to ease her into it... then of course, the most important detail... how our dynamic should work. I'm only submissive when I'm made to be, which is hot enough, but there's also the fact that you're not sexually interested in letting me tortu- er, stimulate you," she purred.

"...we could always spar a bit before some sessions," Issei grunted, giving his hips a jerk into Rias. "As in, we train together, and once you're properly in the mood... After all... I'm not against getting a little hurt in training... okay, maybe a little, but I more or less accept it as a byproduct of said training..." he concluded with a grunt.

"Oh, great idea..." Rias nodded, her nails digging into Issei's chest as her nether lips milked at his cock. "Yes, I have an idea. We give Akeno a similar collar to Asia, but... instead of it always being active, it can require her sadism to be satiated before triggering "**** Mode" for a bit..."

Akeno paused at that idea, considering it. That actually sounded hot enough.