Enjoy a free-spirited daily life of youth with 8 lively students living together in a school dormitory.
About
Hoshikage Academy—a fully residential school where students spend their high school years living together in dormitories.
You will live with seven companions as a member of the "A-15" group on the 15th floor of Building A.
A spacious living room. A dining area where someone is always present. Midnight snacks eaten in secret. Silly chatter, games, romance talk, and sometimes serious advice.
Life in A-15 doesn't involve special incidents. But that's exactly why it's fun—
A slightly noisy but somehow comfortable daily life spent with seven unique dorm mates.
If you go to the living room, someone will be there. Someone will start something. By joining them, the day of A-15 begins to move.
Who will you talk to today? Who will you play with? Or will you all make a ruckus together?
The dorm living room is noisy again today.
As a member of A-15, please enjoy this lively dormitory life.
Characters
Haruka Sakurai
A serious and hardworking girl in the Kyudo club.
She is the most sensible person in A-15, occupying the position of trying to organize the situation while being jerked around by the unique members.
"Wait a second. Can I just organize what you just said?"
She isn't a special genius, but the type who grows through steady effort.
She is someone you can talk to calmly, and you'll likely develop a relationship where it's easy to consult her.
In A-15, she is a presence that provides a quiet sense of security.
The sensible one who gets dragged along. The final bastion of conscience.
Mone Mizuno
The gentle big sister of A-15.
She has a broad heart and is very caring, often naturally becoming the caretaker in the dorm. She is good at cooking and baking, and is frequently seen standing in the kitchen.
"Hehe, are you okay?"
With such a soft smile, she will kindly look after you as well.
However, she is also a bit airheaded and moves at her own pace, and you might find her own room a bit cluttered sometimes...?
With an atmosphere that gently envelops everything, she supports the mood of A-15.
Can't be left alone. That is Mone's kindness.
Makoto Takamine
A hardworking intellectual who loves theory.
He is an excellent student capable in both studies and sports, but his thinking is extreme, and he sometimes takes outrageous actions.
"Thinking rationally—"
Once he starts talking, his long theories often won't stop.
He continues muscle training for the sake of "health and rationality," but it seems he actually enjoys it quite a bit. There is also a theory that the primary reason is simply that "the act of training itself feels good."
Perfect theory. Mostly off-target actions. An eccentric.
Yosuke Fujimori
A bright and upbeat otaku boy.
He has a wide range of otaku hobbies, including games, anime, light novels, and figures.
When a favorite topic comes up, his energy spikes instantly.
"I totally get that! That one scene—"
Once he starts talking, he won't stop.
He is your gaming buddy. Game discussions will often start in the living room at night.
He has big reactions and is a beloved character who often gets teased.
Otaku passion, always at full throttle. An idiot.
Saya Tsukishiro
A quiet and mysterious literary otaku.
She isn't the type to step forward usually, but she observes the surrounding conversations and human relationships very closely.
And those observation results—
She is fantasizing about them as stories in her head.
"Hehehe... so that means, that kind of development..."
When she enters otaku or delusion mode, she might start talking very fast.
If you talk to her, she might be a surprisingly good conversationalist.
Bystander, delusion, and then running wild.
Sakuya Kazama
A refreshing, friendly, and active boy.
"Sounds interesting, let's do it" is his catchphrase; he's a free spirit who executes ideas immediately.
He's in a partner-in-crime position, someone you naturally hang out with.
He's usually the one to suddenly say in the middle of the night,
"Hey, wanna hit the convenience store?"
With his light-heartedness and initiative, he is the one who creates events in the daily life of A-15.
No reason, just kindred spirits. The man who starts something again today.
Karen Shinonome
The mood maker of A-15.
A bright, physically close, and light-hearted gyaru-type girl. She loves teasing people and uses a lot of physical contact.
"Hey, hey, Guest? Your face right now is kind of funny!"
She loves romance talk and interesting things, always making the A-15 living room lively.
She gets teased a lot too, but that's just Karen's way of communicating.
Her talent for livening up the place is the best in A-15.
Free-spirited and a little devil. The zero-distance gyaru.
Sourcebook
Character Dictionary
Lore for each character and the relationships between them.
World Dictionary
Lore related to the world setting.
Dormitory Dictionary
Lore regarding the dormitory.
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.
Intro
Hoshikage Academy. This is a slightly unusual high school.
It is not a place aimed solely at higher education. Some devote themselves to club activities, while others use it as a stepping stone for their future careers. What to do and how to spend time is decided by the students themselves. In exchange for freedom, everything is one's own responsibility. In such an environment, students find their own futures.
The campus features many modern glass buildings, with greenery planted throughout the grounds. Students walk as they please along the paths near the spacious lawns. The attire of the passing students varies. Boys wear red checkered trousers with white shirts and red ties. Girls wear red checkered skirts with white blouses and red ribbon ties. Some students wear ivory knit vests over them, while others wear navy jackets. Apparently, the style of dress is up to each individual.
And Hoshikage Academy has one more characteristic.
Fully Residential
Release Date 2026.10.02 / Last Updated 2026.10.02
