A breakthrough in Physics 101

The scent of dry-erase markers was now cut with the coppery tang of sex. The professor’s monotone voice lectured about entropy, a cosmic punchline to the ordered chaos in the seats. Two rows ahead, the girl with pigtails rocked forward with each thrust from the jock behind her, her pen never faltering as it scratched perfect curves onto her graph paper. Slap-slap-slap against denim. A rhythmic, wet counterpoint to the drone of the lecture.

Bell’s hand was a brand on your thigh, her fingers walking inward with predatory leisure. Your own jeans felt like a prison. Your mind, however, was a shattered window.

The notebook.

It was just a cheap, black composition book poking from her canvas bag on the floor, the kind you’d buy for a dollar. But the light wasn’t a trick of the sun. It was a faint, thready pulse, like a dying glow stick at the bottom of a murky pond. With each weak flash, a fragment of a before stabbed into you.

“You’re tense,” Bell murmured, her lips brushing the shell of your ear. Her other hand came around, sliding over your abdomen, pulling you back against the hard chair. “Just relax and watch. Learning’s more fun this way.”

To your left, the couple in the sixty-nine shifted. The girl—a brunette with glasses—came up for air, gasped, and went back down, bobbing urgently on the thick cock in her face while the guy beneath her lapped at her cunt. The sounds were obscenely wet, a private soundtrack broadcast to the entire back row. Nobody glanced their way. A kid in front of them was asleep.

Bell’s fingers found your zipper. The metal teeth separated with a sound that screamed in the quiet. She wormed her hand inside, her cool palm finding your half-hard flesh. At her touch, your body betrayed you, swelling instantly, filling her grip.

“That’s it,” she cooed, her strokes lazy, possessive. “See? Your body knows what’s real. What’s right.”

But your eyes were locked on the notebook. With every pulse of that sick light, another piece of the ghost-life assembled itself. The way your parents, in framed photos on a mantle that now felt invented, smiled at one child, not two. And you began to wonder, what if... what if you weren't really a twin? Had you even truly existed before today? And what was up with that notebook?

“Bell,” you said, your voice tight.

“Shhh,” she whispered, speeding her hand. Her thumb smeared pre-cum over your sensitive head. “Just feel it. We’re just studying human chemistry.”

Ahead, the pigtailed girl let out a sharp, choked cry and dropped her pen. It clattered on the floor. The jock groaned, his thrusts becoming erratic, brutal. “Take it, sis,” he grunted, slamming her hips into the desk. “Take every fucking drop.”

The words were a key. The crack in the world widened.

In your mind’s eye, you saw Bell, alone in her room, biting her lip in concentration as she wrote. He is my twin brother. We have always been together. We have always been in love. Nobody thinks it’s strange.

The fiction became flesh. Became you.

The fury crested, then hollowed into a terrifying, crystalline clarity. You couldn’t let her know. If she knew you remembered, what would she write next? Would you simply cease? Or become something worse—a mindless fuck-puppet with no will at all?

You had to pretend.

You let your head loll back, a low moan tearing from your throat—part performance, part genuine, agonizing overload. You grabbed her wrist, not to stop her, but to press her hand harder against you. “Fuck, Bell,” you panted, the curse dripping with fabricated desire.

She liked that. Her breath hitched. “Yeah? You want more? Right here?”