I. The Primacy of Cassia Longwood

The first sensation was warmth.

Not the gentle, diffused warmth of morning sunlight filtering through linen curtains, but something deeper, something that pulsed beneath Cassia's skin like a second heartbeat. She stirred beneath her silk sheets, consciousness returning in lazy waves, and with it came an awareness that something fundamental had shifted within her body.

Her eyes fluttered open.

The ceiling of her chamber swam into focus, cream-colored plaster adorned with a fresco of sea nymphs dancing along a shoreline, their bodies entwined in the sort of graceful embrace that had always seemed merely artistic to Cassia before this morning. Before now.

She lay still, cataloguing the changes.

Her skin felt electric, every inch of it alive in a way that bordered on unbearable. The olive skin of her arms, her stomach, her thighs, all of it hummed with a sensitivity that made the simple friction of her sheets against her legs feel like a deliberate caress. Her long blonde hair, loose and tangled from sleep, seemed to weigh differently against her shoulders, each strand a thread of sensation rather than mere decoration.

But the most profound changes were lower.

Cassia shifted her hips experimentally and felt the unmistakable weight of her cock, heavier than it had been yesterday, thicker too, pressing insistently against the inside of her thigh. Her testicles, nestled in their sac, felt fuller, more substantial, as though they had been waiting all her eighteen years for this moment and were now finally, finally awake. Between them, her pussy throbbed with a wetness that she had never experienced before, the lips, slick and parted, eager in a way that made her face flush.

She had reached primacy.

The word echoed through her mind with the weight of prophecy. All futanari grew as omegas until their eighteenth year, their bodies held in careful balance, their dual genitalia present but dormant. She had known this day would come, had been educated about it since she could speak, but knowing and feeling were two entirely different things.

Cassia threw back the sheets and sat up, swinging her legs over the side of her bed. The morning air kissed her bare skin, and she gasped. Even the air felt like a lover's breath, stirring the thatch of hair between her legs, raising gooseflesh along her arms.

She looked down at herself.

Her cock stood at half-mast, uncut and proud, easily six inches even in its current state of partial arousal. The head was flushed a deep rose, glistening with a bead of precum at the tip. Below it, her testicles hung low and full, heavy with potential. And nestled behind them, barely visible from this angle but impossible to ignore in sensation, her pussy ached, as though it was a lock waiting for its key.

Tomorrow, Cassia thought, pressing a hand to her sensitive breasts. Tomorrow, I begin at the Academy as an Unus.

Maidenhead Academy. The words had lived in her imagination for years, the soaring marble columns, the libraries filled with scrolls on philosophy and statecraft, the training grounds where young futanari learned the arts of combat. It was where the daughters of the Republic's finest families went to distinguish themselves, to forge alliances, and ultimately, to decide their place in the hierarchy of wills.

Cassia Longwood, daughter of Senator Demetria Longwood, would not be found wanting.