haru/futaba with haru giving her some 'stamina training'

Notes: Once again, this was written by my tomodachi, cakie_nsfw! If you're interested in more of her work, hit up her AO3. You can find her commission info here.

Futaba struggled to escape the predicament she was in, yet the hands which grasped around her hips gave her little freedom to move as Haru slammed into her hips. There was nothing Futaba could do but take in the brutal treatment which Haru readily inflicted upon her, the heiress’s greed too much for the hermit to handle. "Haru!" Futaba shrieked. Yet there was nothing with the way Haru jerked her hips, forcing the toy dangling from the strap-on deeper into her already stuffed pussy, all Futaba could do was submit herself and hope the frantic girl would show her mercy. But there wouldn't be relief until Haru had reached her orgasm, once started there was no stopping the beast which rose from deep inside her, and only now did Futaba realise it was something she had no hope of handling.

Haru insisted on helping Futaba work on her stamina, something the girl lacked from the sedentary life she lived after the death of her mother, yet Futaba believed her suggestion involved just old-fashioned exercise. One Haru locked the door behind her Futaba's curiosity got the better of her. "Yo, what's in the bag?" she asked the girl, and it was too late to back out when Futaba realised it housed a strap-on.

Everything was a chaotic blur after that. Futaba wondered if they had any sort of foreplay before her sexual encounter, everything that had transpired a mess of sensations which Futaba found herself blind to, aware too late that it was helpless to stop the chaos Haru was willing to suffocate her in. Futaba's predicament had only gotten worse with time, her already poor strength waning even further against the violence and pleasure Haru was treating her with. Futaba had no way to escape the monster that was her friend, she was trapped and pinned under her weight, reduced as nothing but an outlet for Haru to indulge in.

Of course, there was a part of Futaba that disturbed her the most, the primal urge which repressed itself now seeping into her veins, and Futaba already felt helpless against the losing battle that raged against her. She couldn't deny the pleasure which echoed throughout her weak, feeble frame. Unable to swallow the delighted moans as Haru worked her way deeper into her aching walls, hammering against the tender spots until Futaba relented more of her control for her friend to take advantage of. It was maddening, but Futaba knew there was a tipping point to where she could no longer handle the pressure she was in; so when Haru finally locked her into a mating press Futaba willingly took it.