Fuck his slaves while they pleasure Rin.

"Rin, how about you get on the floor and spread your legs?" Kazuma suggested. "Darkness and Megumin, take turns eating her out while I fuck you both."

"Yes Master/Kazuma!" all three replied, and Rin climbed off of the bed, and laid on the floor, parting her legs as Megumin and Darkness got on all fours next to each other, and waited for Kazuma to start fucking him.

He knelt behind Darkness first, and guided his cock into her folds. "Ah... Oh yes Master!" Darkness crooned as Megumin leaned in and started licking at Rin's pussy. Kazuma put his hands on Darkness's ass and started thrusting into her.

After about a minute of this, he pulled out of Darkness, and plunged into Megumin, who mewled in pleasure, pulling away from Rin's cunt to give Darkness a chance to start eating Rin out. "Oh... Fuck me Master!" Megumin moaned as he thrust in and out of her.

This pattern continued, Kazuma swapping between the two slaves every minute or so, and whoever was getting fucked talked dirty to him, while the other licked at Rin. Rin cooed and bucked her hips into Megumin's face a bit as she began to grope her own boobs, enhancing her pleasure.

Kazuma switched to Megumin one more time and felt his cock pulsing. "I'm gonna cum," he moaned, and Rin nodded in agreement with that as Darkness resumed eating her out.

"Cum inside me Master!" Megumin cried out, and Kazuma obliged, groaning in pleasure as he filled Megumin's pussy, and Rin spasmed, arching her back as Darkness finished her off. The four took a moment to relax as Kazuma pulled out of Megumin.