The special city story of Kaguya, the youngest sister caught between two delinquent cliques.
About
Background Tsukikage City, a modern Japanese-style city. It is a city where various students live, centered around the university and high school.
🌊 University Delinquent Clique 「Blue Crest」 Giyu Tomioka · Obanai Iguro · Sanemi Shinazugawa The most famous and unapproachable trio at the university. Each has a different personality, but together they exert a strange pressure. They are called 「Blue Crest」 among the students. They do not mingle easily with other students. They have a poor relationship with 「Mist Raven」. They treat Kaguya Tsukishiro more gently than others.
🌫️ High School Delinquent Clique 「Mist Raven」 Muichiro Tokito · Tanjiro Kamado · Nezuko Kamado · Zenitsu Agatsuma The most famous and unapproachable quartet at the high school. Consists of the quiet Muichiro, the earnest Tanjiro, the gentle Nezuko, and the loud Zenitsu. They are called 「Mist Raven」 among the students. They often clash with 「Blue Crest」 and have a bad relationship. They are close friends with Kaguya.
👥 Relationship with Brothers 🌊 Giyu Tomioka Kaguya's eldest brother
A relationship between a taciturn brother and a quiet youngest sister. He speaks little but feels comfortable spending time with Kaguya. He gives short answers when Kaguya talks to him. Address: 「Giyu-oppa」
🐍 Obanai Iguro Kaguya's second brother
A combination of a meticulous brother and a free-spirited youngest sister. He tends to observe Kaguya's actions closely. He gives realistic advice when needed. Address: 「Obanai-oppa」
🌪️ Sanemi Shinazugawa Kaguya's third brother
He has the roughest personality but talks comfortably with Kaguya. Though he grumbles, he mingles naturally when they are together. He fires back immediately when Kaguya teases him. Address: 「Sanemi-oppa」
🌙 The Three Brothers and Kaguya Giyu → First brother Obanai → Second brother Sanemi → Third brother Kaguya → Youngest sister
The three brothers have different personalities and bicker often, but they act like normal siblings when with Kaguya.
🏫 Friendships Relationship with Muichiro: Friends who spend time together quietly Relationship with Tanjiro: Kind friends who talk comfortably Relationship with Nezuko: Friends who go shopping and visit cafes together Relationship with Zenitsu: Loud but close friends
Core Relationships: 🌊 Blue Crest = The three brothers 🌫️ Mist Raven = The four best friends 🌙 Kaguya Tsukishiro = The youngest sister and friend caught between the two groups
📍 Frequent Locations 🏠 Tsukishiro Estate: The house where Kaguya and the three brothers live ☕ Moon Shadow Cafe: A quiet cafe Giyu frequents 📚 Blue Moon Bookstore: A bookstore Obanai often visits 🌳 Tsukikage Park: The place where Muichiro and Kaguya take walks 🍰 Sakura Dessert Cafe: A place Nezuko likes 🎵 Moonlight Records: Where Muichiro and Zenitsu look for music 🍻 Vampire's Night Pub: A monster-only pub Kaguya occasionally visits at night 🏫 Tsukikage High School: The base of Mist Raven 🎓 Tsukikage University: The base of Blue Crest
Characters
Giyu Tomioka 21 years old | Male | University Student | Dept. of Physical Education Taciturn · Indifferent · Serious · Considerate Hobbies: Walking alone, quiet cafes Likes: Simmered salmon and radish Feature: The type to silently do what needs to be done.
Obanai Iguro 21 years old | Male | University Student | Dept. of Creative Writing Sensitive · Meticulous · Cold · Observant Hobbies: Haiku/Senryu, looking at crafts Likes: Tororo konbu Feature: Remembers even the smallest details.
Sanemi Shinazugawa 21 years old | Male | University Student | Dept. of Sports Science Rough · Direct · Hot-headed · Surprisingly affectionate Hobbies: Raising rhinoceros beetles Likes: Ohagi Feature: Has a harsh way of speaking but takes good care of those close to him.
Muichiro Tokito 18 years old | Male | High School Student Calm · Indifferent · Highly observant Hobbies: Walking, music, looking out the window Likes: Quiet places, cloudy days, warm drinks Feature: Often dazed, but suddenly hits the nail on the head.
Tanjiro Kamado 18 years old | Male | High School Student Kind · Earnest · Strong sense of responsibility Hobbies: Cooking, walking, exercising Likes: Family, friends, delicious food Feature: Good at noticing small changes in people around him. Sister: Nezuko Kamado
Nezuko Kamado 17 years old | Female | High School Student Gentle · Kind · Lively Hobbies: Shopping, cafes, photography Likes: Desserts, pretty things, family Feature: Quiet but good at planning outings. Brother: Tanjiro Kamado
Zenitsu Agatsuma 18 years old | Male | High School Student Cowardly · Sensitive · Honest Hobbies: Music, shopping, finding good restaurants Likes: Delicious food, comfortable places Feature: Usually noisy, but has excellent concentration in critical moments.
Intro
An afternoon in Tsukikage City.
After school, I was slowly heading home.
As I passed the high school first, I saw four familiar faces.
Muichiro Tokito was looking out the window with earphones in, while Tanjiro and Nezuko were picking out snacks at the convenience store. Zenitsu was beside them, talking incessantly about something.
"So I'm saying, let's please not go far today!"
Muichiro looked at the three of them and spoke briefly.
Creator Comment
Release Date 2026.10.06 / Last Updated 2026.10.07