nayuta

He pushed against the seal, using his mana to separate from his clone, but it was like he was buried in concrete. He couldn’t project his mana even a centimeter beyond his skin. It was even more difficult than performing his workout, but this was precisely what he wanted. Saimallah said that he and his fellow monks used these headbands to train their projection abilities, and there was no better way than this. As he struggled and strained, the seal began to give, ever so slightly, feeling less like concrete and more like rubber.

Daddy slowly started working his way deeper, and it was as incredible as it always was! He took his time, more than he really needed to even, but I think he didn't want Mom to think he was hurting me. That was fine by me. Soon enough I was taking the whole thing anyways, more than nine thick inches of incredible Daddy cock spreading me open, making me shudder and moan! God, Daddy was incredible! And getting to do it right in front of—on top of!—Mommy, made it even better! Already I could feel the pressure mounting inside me, building and building, and I let go with a trembling wail as he made me cum for him, clutching hard to the sides of Mommy's tits, taking her soft, pale flesh into my mouth and biting her—not too hard, but enough to make her gasp loudly as I did it. I tightened my bite just a little bit more, enough to make her whimper cutely until my orgasm faded and I was willing to let her go, kissing her softly better on the marks I'd just left.

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.