Fuck her against the wall.

Feeling himself start to soften, Kazuma paused for a moment, before looking towards the Sex Note. He turned away from Darkness for the moment, and walked over to it, and opened it back up, writing in it, "Kazuma Sato will lose his refractory period, and have enough stamina to go multiple rounds during sex, and enough sperm production to ejaculate at least a few times per sexual encounter."

His cock immediately returned to full mast, and with a smirk, he turned to Darkness, who noticed he was hard again, and looked back up at him excitedly. "Go walk over to the wall, and lean forward with your hands against it," he ordered her.

"As you command, Master," she smiled, rising to her feet, and turning around, her ass swaying as she walked. She stopped a bit short of the wall, and leaned forward, planting her hands on it, and of course, sticking her ass out. She looked back, and waved it at him invitingly. "I'm all yours," she smiled at him.

He approached her from behind with a smile, and prepared to thrust into her once his cock was lined up. He then gazed at her shapely rear, and ordered, "Beg me for it. And make it convincing."

"Please Master, use this slut's pussy!" Darkness pleaded with zero hesitation, waving her ass some more to entice him. "This **** has a nice and tight pink cunt that will make a perfect sleeve for your cock. It exists for your pleasure!" she continued, not focusing on her own needs, instead bringing up how good she'd make him feel, like the good sex **** she was.

"Nice approach," he praised his **** girl, giving her ass a slap.

"Ah!" she moaned, then she moaned again as he rammed his dick into her waiting folds.

"Wow, you were right, it is a nice and tight pussy," he grinned, resting his hands on her ass cheeks as he began thrusting into her, going rough and hard, accurately guessing that's how she wanted it.

"Ah! Yes Master, fuck me! Fuck your new **** girl hard!" she cried out.

He slapped her ass another time as he kept pumping into her, his pelvis slapping against her ass as he kept going, before he moved his hands to hold her waist, continuing to pound away at her. She gasped in pleasure as she lowered her head, her tongue lolling out, her pussy clamping down on his shaft. "Master, I'm about to cum..." she moaned.

His cock throbbed as he kept thrusting. "Good timing, so am I," he grinned, before grunting, and his seed flooded her entrance. Darkness screamed in orgasm as this happened, and she leaned heavily on the wall for support as Kazuma panted, still partially holding her up.