Chapter 12: Backfire
The bathhouse steam was a thick, physical presence. It coiled around the marble columns, blurred the edges of the gilded mirrors, and stuck to the skin like a second, damp hide. The air smelled of minerals, lavender oil, and beneath it, the faint, metallic tang of the mansion’s magic.
Megumin knelt in the center of the vast, sunken hot spring, the scalding water lapping at her breasts. Her skin was flushed a deep, mortified red, but her jaw was set. She stared straight ahead at a mosaic of a water nymph, her eye unblinking. Kazuma stood behind her, his hands gripping her hips, his thumbs digging into the soft flesh above her pelvic bones. The water sloshed around his waist with a rhythmic, greedy sound.
Aqua lounged on the submerged marble bench at the pool’s edge, fanning herself with a hand. Her blue hair was piled messily on her head, tendrils plastered to her neck. She watched with the detached interest of a spectator at a particularly mundane play. “You look like a shrimp being boiled, Megumin. A very scrawny, dramatic shrimp.”
“Silence, you bloated blueberry!” Megumin shot back, her voice trembling only slightly. The heat was everywhere, inside and out. Kazuma’s presence at her back was a firm, unyielding wall of heat.
“You brought this on yourself,” Kazuma muttered, his voice low and close to her ear. His breath was hot. “You woke up competitive. This is the prize.”
He moved, a slow, testing roll of his hips. He was already inside her, had been since he’d guided her into the water and positioned her without a word. The buoyancy of the spring changed everything, made her feel weightless and utterly vulnerable to his control. Each movement was a slow-motion earthquake deep in her core.
She bit down on a whimper. The water magnified every sensation, the heat making her nerves scream. It wasn’t just pleasure; it was an overwhelming assault. Her fingers, splayed on the slippery underwater tile floor, curled into claws.
“Prize,” she whispered, the word bubbling out with a gasp. “I am no prize. I am… I am…”
Kazuma thrust harder, cutting her off. The water surged around them. “You’re the one who got on her knees this morning. You’re the one who wants to be useful. This is useful. Shut up and take it.”
Aqua sighed, a long, luxurious sound. She slid off the bench and waded towards them, the water rippling around her full breasts. “You’re so crude, Kazuma. It’s almost impressive.” She stopped beside them, her hand trailing through the water before resting on Megumin’s damp shoulder. “Poor little archwizard. All that big magic, and here you are. Just a hole.”
Megumin flinched. Her pride, a brittle, spiky thing, shattered into a thousand burning pieces. A tear escaped, mingling with the condensation on her cheek. She hated them. She hated him. She hated the traitorous throb between her legs that synced with his every movement.
Kazuma’s pace increased. The sloshing of the water became frantic, a chaotic counterpoint to the wet, rhythmic slap of skin on skin now audible above the surface. Steam billowed around them, a private cloud. He was breathing hard, grunting with each drive forward.
His grip on her hips tightened, fingers pressing hard enough to bruise. He leaned over her, his chest against her slick back, his mouth near her ear. His movements became erratic, powerful, devoid of any rhythm but that of his own impending release.
“Look at her,” he snarled, his voice raw. “Look at the damn nymph on the wall.”
Megumin’s vision blurred. The mosaic swam in and out of focus.
Kazuma’s body went rigid. He drove into her one last time, deep, burying himself to the hilt, pinning her in place. A guttural sound ripped from his throat, a command filled with a dark, twisted tribute.
“EXPLOSION!”
The word was a thunderclap in the steam-filled chamber.
It wasn’t a spell. It was a mockery. A brutal, perfect theft of the one thing that was solely hers, the core of her identity, used as a profane climax. As he roared it, he emptied into her, a final, pulsing invasion that seemed to scorch her from the inside.
Megumin shattered.
A soundless scream locked in her throat. Her body convulsed, a series of uncontrollable spasms that had nothing to do with pleasure and everything to do with absolute, devastating violation. The world dissolved into a white-hot nothingness.
When awareness seeped back, the water was still. Kazuma had pulled out. She felt empty, cold despite the spring’s heat. A strange, thin ache pooled low in her belly.
He waded past her towards the steps, not looking back. “Wash up. The water’s getting cold.”
Aqua blinked, then a slow smile spread across her face. She looked from Kazuma’s retreating back to Megumin’s frozen, shell-shocked form. “Oh,” she said, understanding dawning. “Oh, that was mean. Even for you.” There was a hint of admiration in her tone.
She followed Kazuma, leaving Megumin alone in the center of the pool.
Megumin didn’t move. The steam condensed on her skin and trickled down like cold tears. She could still feel the ghost of him inside her, the echo of his stolen word ringing in her skull. Explosion. Her great and terrible art, the source of her power and her weakness, the incantation that left her broken and useless every day. He had taken that, too. He consumed everything.
Slowly, mechanically, she brought a hand down between her legs, beneath the opaque water. She touched herself. Sore. Used. Sticky with him.
Another tear fell, then another. They were silent, efficient. She didn’t sob. She just knelt there as the heat leached from the water, until her fingertips pruned and her muscles ached from stillness.
A distant clatter came from the direction of the kitchen—the familiar, magical sound of the pantry refilling. The mansion was pleased. Their transaction was complete.
She finally stood, the water streaming from her body. Her legs trembled, but held. She climbed out of the spring, the cool air shocking her flushed skin. She didn’t bother drying off. She walked, naked and dripping, across the slick marble floors, leaving a trail of wet footprints that faded slowly behind her.
In her small, cold room, away from the master bedroom and its lingering perfumes, she pulled a simple nightdress over her head. It stuck to her damp skin. She crawled into her narrow bed, drawing the thin blanket up to her chin.
She stared at the ceiling, seeing not plaster and beams, but the leering face of the water nymph, and behind it, Kazuma’s indifferent eyes. The hollow ache inside her had hardened into something else. Something cold, and sharp, and quietly, terribly determined.
She would cast her explosion tomorrow. She would pour every ounce of her fury, her humiliation, her shattered pride into the incantation. She would make the blast so vast, so devastating, that the shockwave would scrub his mocking voice from the very air.
And then, collapsed and useless in the aftermath, she would wait to see if he came to carry her home.
The thought was the only warmth she had. She clung to it in the dark.