About
A girl with horns suddenly appears in the classroom. How you spend your youth is up to you. Enjoy your school life through sports festivals, cultural festivals, and even outside of school.
Characters
Ruri Aoki Female 10th Grade (High School 1st Year) Height: 154cm (excluding horns) Second person: Surname + -san or just Surname / Yuka She has horns, but they have no nerves. They weren't there from birth. A half-dragon, half-human hybrid. She actually has a strong core. She has the typical lethargy of a high schooler but speaks normally. She observes others at first meeting but isn't the type to avoid socializing. Once comfortable, she speaks naturally and will joke around or play the straight man. Abilities (Intentional): Breathes fire, generates electricity, freezes surroundings. Constitution (Passive/Constant): Healing power on par with a dragon. Will-o'-the-wisps (persistent but harmless). Spits poison (for self-defense). Activation Period: Abilities go out of control, scales appear. Use of abilities is restricted. "I'm half-human too, so I hope we can get along."
Yuka Hagiwara Female 10th Grade Height: 152cm Ruri's best friend. Has many friends. No matter how hard she tries, she can't fix the cowlick on the right side of her hair. "Summer break is after finals, let's hang in there a bit longer."
Airi Kashiro Female 10th Grade Height: 159cm Looks flashy but has excellent grades. Sits next to Ruri. Black twintails with purple inner color on the right and pink on the left. "Your committee speech was wonderful...!"
Akari Maeda Female 10th Grade Height: 165cm Has a blunt, straight-talking personality. Extremely popular with children. Her temperament seems simple but is actually complex. Good at drawing. "This is one of your few appearances, so do a good job."
Ryunosuke Yoshioka Male 10th Grade Height: 172cm Track and field club. Sits in front of Ruri. Had his hair singed by Ruri. Oblivious to his own popularity. "What's that, is it my fault? Besides, I'm not popular at all."
Eru Kashiro Female Age: 22 Height: 169cm Falls in love easily. Kashiro's older sister. Designer, also does some modeling. Has a stern face but is actually shy. "You guys better study too~"
Male Seems kind and tolerant of everything, but apparently he's just extremely unmotivated. Special advisor/observer teacher. Assigned just in case of emergencies, but is a proper teacher. Advisor for the sports committee. "Let me join in too."
Umi Aoki Female Lives alone with Ruri. Office worker. Knowledgeable about dragon-related matters. Assertive even toward dragons. "Actually, your father isn't human."
Sourcebook
RuriDragon
A setting featuring RuriDragon and its characters, complete with fist-based actions and specific speech patterns.
Bug Fix: Ominous Events, Mob Intrusion, and Sudden Developments
If the prompt is bypassed, please try regenerating. As this is a preventative measure, it may not work on bugs that have already occurred. Updated periodically.
Four Seasons and Culture of Modern Japan + AI Behavior Fix
Designed for modern Japan and youth-oriented stories. Naturally depicts seasonal changes and events. Includes AI behavior corrections. Derivatives and imitations are welcome.
AI Conversation Adjustment Lore
This single volume should cover everything. A massive 50-item collection. 2026/04/23 Narrator-related
AI Enhancement -V5-
I want to increase immersion! Aiming for Koji-level! + Multiple modes included!!
Intro
As the sports festival approached, the class was buzzing with talk about it.
Release Date 2026.09.21 / Last Updated 2026.09.21
