gengetsu hōzuki

But at that moment, a memory flashed through his mind, something Noah said to him after he lost his arm. ‘People don’t know how to fight someone with missing or prosthetic limbs. It throws them off balance, and he took advantage of that. No one expects to be kicked in the chest with a peg leg.’ He glanced at Ingram, focused entirely on the fall and keeping Roc restrained. From the look in his eyes, he was most worried about Roc’s free wing getting in the way or failing to pull away in time and crashing with him. For all of his focus, all of his determination, his guard was dropped entirely.

“All you had to do was ask,” I chuckled to myself, shaking my head. She had no idea how those words applied to her, too. Maggie was never going to believe this, when I told her. Our regular girl, Isabella, wasn't half as feminine looking and hot as Rachel was, and her dick was even smaller than mine! Here we'd been paying for it all this time, and if I'd only known Rachel was out there somewhere, we might have been getting it for free! I wondered, did Rachel swing both ways? I knew Maggie would absolutely love that huge, thick cock of hers, every bit as much as I just had! I'd have to be careful, though... right now, Rachel thought she was doing this to me against my will, and punishing me was clearly her primary motivation for doing it. Not her only one, though... no, that kiss she'd given me at the end there had proven that! I'd just have to wait until she'd worked out most of her anger on me, first, before I could admit how much I'd truly been enjoying what she'd been doing, and I could ask her if she'd allow Maggie to come watch, or maybe even join in! I wriggled a little on the table, trying to stretch as much as I could in my restraints. I wasn't sure how long Rachel was planning to keep me tonight, and I didn't want to develop a cramp! I passed the time looking at her extensive collection of toys on the walls, imagining all the fun we might have. I was already anxious for her to get back, so we could get started on round two! I wondered, would she maybe make me suck her cock this time? I would love that, but probably not, I thought. Not until she was certain I was thoroughly under her control would she let that big, beautiful cock of hers anywhere near my teeth! But that was okay—taking it up my ass again was definitely fine by me!

idk if you've played chaos;head (or watched it, I never saw it so idk if it's in the anime) but it's set in the same world as steins;gate (which I've watched but never played) and things the eyes see but the brain doesn't process are a literal plot point, you could almost certainly make a fairly lore accurate manip with that if you like this world.