The virtual training room hummed with the faint, sterile drone of the simulation engines. 涧田秀人 stood at the edge of the tatami mat, his palms slick with sweat. He had designed this space—the layered textures, the scent of woven rush, the soft glow of paper lanterns—but he had never intended to be a participant. His eyes darted to the center of the room, where 川瓷静华 knelt, her long black hair pooling like ink over her bare shoulders. She was naked, utterly unashamed, her large breasts pressing against her thighs as she bowed forward. Beside her, the health teacher—a woman in her forties with a severe bun and a white coat over her kimono—held a katana with practiced ease.
“You will observe first, 涧田-kun,” the teacher said, her voice flat. “Then you will assist.”
Hideyuki swallowed. His mouth was dry. He had seen blood in simulations before—red paint, algorithms of splatter—but this was different. Shizuka’s skin glowed under the virtual sun, and the small blade she held trembled in her grip. She looked up at him, her cool mask cracked by a smile that was almost fond, almost predatory.
“Don’t worry,” she said. “I’ve done this hundreds of times. It’s just practice.”
She pressed the blade to her abdomen. The incision was clean—a horizontal cut, deep and deliberate. Blood gushed from the wound, cascading over her thighs, pooling on the mat. Hideyuki’s breath caught. The color was wrong. Too vivid, too arterial. The smell hit him a second later—copper, salt, something metallic and alive. His stomach lurched, but his pulse quickened.
The teacher stepped forward. “Kaishaku,” she announced, and raised the katana. The blade fell in a perfect arc, severing Shizuka’s neck with a single, crisp stroke. Blood erupted from the stump, arcing like a crimson tree branching into the air, splattering the teacher’s white coat, the tatami, Hideyuki’s cheek. He felt the warm droplets cool on his skin. Shizuka’s body crumpled, her head rolling to a stop at his feet. Her eyes were still open, fixated on him, a faint smile frozen on her lips.
The simulation paused. The body flickered, but the blood remained—a digital stain, but real enough to make his hands shake.
“Your turn,” the teacher said, wiping her blade with a cloth. She knelt beside Shizuka’s still form and gestured for Hideyuki to approach. “You will perform the kaishaku on a living simulation. 川瓷-san will guide your hand.”
Shizuka’s body reset—a blink and she was whole again, kneeling, naked, her long black hair restored. She turned to him with a soft laugh. “Come on, Hideyuki. Don’t be shy.” She reached out and grabbed his wrist, pulling him down to his knees beside her. Her skin was warm, her grip firm. She pressed her body against his side, her breast flattening against his arm, and he felt a flush rise to his cheeks.
“I… I don’t know how…” he stammered.
“I’ll help you.” She took his right hand, laced her fingers through his, and guided it to the katana’s hilt. Her hand over his, she raised the blade. “Just follow my lead. Cut clean. Quick. Don’t hesitate.”
The teacher knelt in front of them, her back to them, and bowed her head, exposing her neck. Shizuka’s breath was warm against Hideyuki’s ear. “Imagine it’s your enemy. Or someone you hate. Or someone you love. It doesn’t matter. Just feel the edge.”
Hideyuki’s heart hammered. He could feel the weight of the blade, the slight resistance as Shizuka adjusted his grip. Then she pressed his hand forward. The blade bit into the teacher’s neck—a soft, wet sound, like slicing through a ripe melon. The teacher gasped, a gurgle, and then the blade cleaved through sinew and bone. Blood sprayed, hot and slick, coating Hideyuki’s arm. The teacher’s body toppled forward, the head rolling away, and a fountain of red jetted into the air, splashing Hideyuki’s face.
He froze. A shiver ran through him—not of revulsion, but of something else. A thrill. A dark, pulsing delight that tightened his chest. The smell of blood filled his nostrils, and his mouth watered. He looked down at his hand, still gripping the katana, now dripping crimson. Shizuka released him and leaned back, a satisfied smirk on her lips.
“Good boy,” she whispered. “How does it feel?”
He couldn’t answer. His mind was a storm of images—the teacher’s severed head, the fountain of blood, the weight of the blade in his hand. And beneath it all, a single, sharp urge: he wanted to see more. He wanted to be the one kneeling, the one cutting, the one bleeding.
The simulation ended. The bodies vanished. The room reset to its default state—bright, clean, empty. Hideyuki stood alone, his clothes dry, but his skin still prickling with phantom warmth. The health teacher’s voice crackled over the intercom: “Practice completed. Return to the preparation room.”
He walked out in a daze. The corridor was quiet, the fluorescent lights humming. He wiped his face with his sleeve, but there was nothing to wipe. The blood had been digital. But the image was burned into his retinas.
He thought of 月柳佳子—her short white hair, her sharp blue eyes, the way her lips curled when she smiled at him after her duel. He had been saving a message from her on his wrist device. A sweet, clumsy confession about wanting to spend time with him after the match. He had felt his heart leap when he read it, a pure, innocent happiness.
Now, as he replayed the kaishaku practice, that purity felt tainted. The image of the teacher’s head rolling across the mat intercut with Yoshiko’s face. He imagined her kneeling, the blade in her hands, the red tree blooming from her neck. His stomach turned—but his pulse raced.
He pressed his palm against his chest, trying to slow his breathing. No. That was wrong. He cared for her. She was kind, gentle, beautiful. He should not want to see her like that.
But the urge writhed in his gut like a living thing, and he knew, with a cold certainty, that the practice had awakened something he could not unsee. Something he would have to face.