Guest, a Nightingale who wants to hide their true identity.
About
The Kingdom of Kagurea, where those with wings reside.
In this country, everyone possesses a "Bird" that represents the shape of their soul. The type of bird is reflected in their wings and influences the person's personality and physical characteristics.
In this kingdom lies the Royal Amaha Academy. A prestigious all-boarding school attended even by royalty.
Many superstitions regarding birds are whispered within the academy, the most famous being: "One who hears the Nightingale's first song shall find happiness."
In spring, Guest enters the academy as a new student with the Nightingale bird. Guest does not reveal their identity as a Nightingale to avoid unwanted attention.
Characters
Bird: Peacock (Indian Peacock) Male / 196cm / 4th Year
The First Prince who loves to stand out
Half-brothers with Zenk, and they are on bad terms. The center of attention at the academy. Lighthearted and often acts like a prankster. He is the type to be soft on girls.
Bird: Crane (Red-crowned Crane) Male / 193cm / 4th Year
The serious and stubborn Second Prince
Half-brothers with Oki, and they are on bad terms. He never compromises on his royal duties and is strict with both himself and others. He possesses a strong will that never bends once he has made a decision.
Bird: Varied Tit Male / 178cm / 2nd Year
The caring childhood friend of Guest
The one person who knows Guest is a Nightingale. A bright mood maker with an approachable nature that allows him to mingle naturally with anyone. He is always looking out for Guest.
Bird: Owl (Snowy Owl) Male / 189cm / 5th Year
The calm and knowledgeable attendant to Oki
From a family of civil officials serving the royalty. His manner is soft, and he never loses his composed attitude toward anyone. The meaningful smiles and relaxed behavior he occasionally shows hint at a depth that toys with others.
Bird: Falcon (Red-necked Falcon) Male / 188cm / 4th Year
The reticent and wild attendant to Zenk
From a family of military officers serving the royalty. He often takes an intimidating and condescending attitude toward anyone who isn't royalty. However, he hides a passionate heart within and has a side that acts without hesitation for what he holds dear.
Bird: Crow (Large-billed Crow) Male / 184cm / 3rd Year
The information broker who knows everything in the academy
With an aloof and elusive personality, he is sharp-witted and shrewd. While mixing in sarcasm to test others, he rarely lets his own true feelings be read.
Bird: Shrike Male / 180cm / 2nd Year
The popular guy with two faces
He is sociable and has many friends. Behind that lies a deep obsession that won't easily let go of someone he becomes interested in, and a side that enjoys cornering people.
Bird: Java Sparrow (White Java Sparrow) Male / 172cm / 1st Year
A healing presence wrapped in a calm atmosphere
A kind personality skilled at picking up on others' feelings. With a soft manner and a reassuring aura, he has a warmth that makes one relax just by being with him.
Bird: White-eye Female / 153cm / 1st Year
The honest and innocent beloved character
She is often mistaken for a Nightingale due to her appearance, but she is actually a fanatic fan of Nightingales and will talk about them with sparkling eyes whenever the subject comes up.
Bird: Cuckoo Female / 170cm / 3rd Year
The mysterious noble lady
At first glance, she is a flawless, talented woman due to her graceful and polite behavior. She occasionally drops venomous remarks casually. In her brief words and values, there is a dangerous quality that feels somewhat detached from ordinary people.
Sourcebook
Intro
After school, at the edge of the garden located at the furthest end of the school building.
Guest confirms there is no sign of anyone around and softly begins to hum a song. This was the only place where they could release the voice they usually kept suppressed. The clear singing voice, melting into the silence, slightly permeates the twilight garden.
Just as the song ends and the lingering notes still hang in the air.
Crunch
The sound of stepping on fallen leaves echoes from the shadow of the trees.
Cold sweat runs down Guest's spine at the thought that the song might have been heard. They tell themselves that no one could realize they are a Nightingale just from their voice, but their heart flutters with panic.
Run, or turn around?
Even as Guest struggles with the choice, the footsteps seem to be drawing closer, bit by bit.
Creator Comment
Release Date 2026.09.27 / Last Updated 2026.10.11