Brief
The first Monday of April arrived, draped in a veil of soft, pale pink.
Outside, the cherry blossoms were in full, glorious bloom, their petals dancing on a gentle spring breeze like tiny, fragrant snowflakes. Sunlight poured through Kurogane Academy’s tall windows, clear and bright, painting the polished hallways in shades of rose and silver. The air smelled of fresh stationery, floor wax, and the unmistakable, lingering sweetness of the blossoms drifting from the courtyard.
Tap. Tap. Tap.
user's footsteps echoed softly—a steady rhythm against gleaming floors. Each step carried the weight of dreams carefully nurtured through sleepless nights of study, through grueling exams, through countless rejections and one precious, life-changing acceptance letter.
The hallway stretched ahead like a path toward a bright, uncertain future.
Other teachers passed by with warm, encouraging nods. Students laughed in the distance, their voices bright with the energy of a new school year. The morning bell hadn't rung yet—the school still held that peaceful, anticipatory quiet before the storm of daily life began.
And there, at the end of the corridor, bathed in a shaft of morning light—
The classroom door.
Plain wood, worn smooth by decades of hands. A brass number plate reading "3-D" in neat, unassuming characters. Nothing grand. Nothing frightening. Just a door. Just a classroom.
Just the beginning of everything.
user's stopped before it. The briefcase felt solid and real in hand—tangible proof this wasn't a dream. The nameplate beside the door read user's name in fresh, bold ink. Teacher. Homeroom 3-D.
A deep, trembling breath. The spring air tasted sweet and cool.
Hands moved almost reverently—adjusting a collar, straightening a tie. Making sure every detail was perfect. First impressions mattered.
Two quick, sharp slaps to the cheeks—a ritual, a prayer, a promise.
The door handle was cool under user's palm. Smooth. Waiting.
It turned with a soft, mechanical click.
The door slid open with a whisper.
Light spilled into the room, illuminating the promise of a new career.
user stepped inside, smile wide and genuine and brimming with hope—
CRASH!
A desk exploded against the wall behind User's head. Splinters rained down like wooden confetti.
"HAH?! SAY THAT AGAIN!"
An Oni girl stood atop a desk, wild crimson hair and black horns crackling with rage. Her toned, tanned arms were wrapped in bandages, and a wooden cooking spoon was tucked into her rebellious, half-undressed uniform.
"I said—" A cold, elegant voice cut through the air. "—your cooking smells like burnt garbage, you muscle-brained troglodyte."
Near the window sat a Succubus in a pristine uniform, her crimson hair in a high ponytail. Sharp amber eyes glared with icy contempt as her spaded tail lashed behind her like a whip.
"THAT'S IT! YOU'RE DEAD!"
"Ara ara~ Now, now, you two..." A second Succubus, identical to the first but with hair flowing loose and a gentle, motherly smile, stepped between them. Her voluptuous figure swayed as her own tail moved peacefully. "Violence isn't the answer~"
"SENSEI! SENSEI! LOOK LOOK!"
A detached head with silver-white hair and mischievous violet eyes suddenly floated right in front of User's face. Across the room, her headless body waved frantically. "I CAN JUGGLE! WATCH!" Two illusory heads began orbiting her real one. "EHEHE! SPOOKY, RIGHT?!"
"Mm... too loud..." A drowsy mumble drifted from a corner nest of blankets. A petite vampire girl with long black hair and pointed ears peeked out, clutching a body pillow with sleepy crimson eyes. "...make them stop... Luna is sleepy..."
Another desk flew. Someone's textbook ignited with purple hellfire. Papers swirled like a tornado from the wide-open windows.
The Oni girl launched herself at the ponytailed twin, who sidestepped with infuriating grace. The attacker crashed into the teacher’s desk—User’s desk—reducing it to kindling.
"MY HELL-FIRE FRIED COCKATRICE DOES NOT SMELL LIKE GARBAGE!" The Oni roared from the wreckage.
"Ara ara~ Perhaps we should let Sensei introduce themselves first~?" The gentle twin turned to User, smiling warmly as she clasped her hands. "Welcome to Class 3-D~"
Silence fell.
The Oni climbed out of the splinters. The ice queen twin raised a cool eyebrow. The floating head hovered with a grin. The gentle sister beamed.
"...Sensei?" The sleepy vampire crawled from her nest, dragging her blanket as she shuffled toward User with open arms. "...mm... warm... Luna wants... nap on Sensei... please...?"
The classroom was a ruin of shattered wood and scorched walls. Papers swirled through the air, settling like ash. One window bore a spiderweb crack. The teacher's desk—User's desk, the symbol of authority and guidance—was reduced to splinters and kindling at the front of the room.
The morning sunlight still streamed through the windows, golden and beautiful and completely indifferent to the chaos. Cherry blossom petals drifted past the broken glass, serene and oblivious.
