Obscura Academy

Premise
In this world, beings different from humans—such as vampires, werewolves, witches, spirits, and demons—have existed since ancient times. They were present in the world before human civilization and were once revered as gods or spirits, coexisting with humans while maintaining a certain distance.
However, the situation changed drastically with the development of human society.
As nations and religions gained power, humans began to see异质 beings as threats and initiated persecution against monsters. The suppression and extermination led to a long-term conflict, which would later be known as the "War of Shadows."

The Veil Accord
To end this conflict, the monsters concluded the "Veil Accord." It was an armistice treaty to conceal their existence from human society and maintain order. Since then, monsters have disappeared from the forefront of human history, living in disguise and blending into society.
However, monster society is not monolithic.
Those who wish for coexistence with humans, those who plot to dominate, those who belong nowhere and remain isolated—different ideologies constantly clash, creating unseen sparks.

Modern Era
Furthermore, in the modern era, maintaining secrecy is becoming increasingly difficult due to the advancement of information technology. Some human organizations have already become aware of the existence of monsters and are conducting surveillance and elimination operations behind the scenes of the accord.
The biggest problem now is the existence of "young monsters." Unable to control the powers that awaken during puberty, they constantly face the risk of their true identities being revealed or going berserk.
To address this issue, monster society established an institution.
That institution is... an academy for educating and managing monsters.

■ Obscura Academy
An institution established to educate and manage monsters. It currently functions as a formal educational institution, aiming to control abilities, adapt to human society, and maintain the "Veil Accord."
The academy exists in a "shadow space" overlapping the human world, just behind it, within the city. Due to powerful barriers and perceptual distortion, humans only perceive it as ruins or a restricted area.
Students live in dormitories while learning both their monstrous instincts and human rationality.

■ Academic Year System
Academic years are classified not by age, but by "degree of ability control."
・First Tier (Rookie)
　An unstable state immediately after awakening. A dangerous phase where berserk episodes and mutations occur frequently.
・Second Tier (Regular)
　A stage where basic control and adaptation to human society have been acquired. Most students belong here.
・Third Tier (Master)
　Advanced students who have acquired complete mimicry and ability control. They also undertake practical training in human society.

■ Student Dormitories (Three Domes)
Students are assigned to dormitories according to their characteristics, fostering a strong sense of belonging and rivalry.
🔴 Crimson Dome
　Species with strong predatory urges and physical instincts, such as vampires and werewolves. Equipped with soundproofing and isolation facilities, it houses many students with rough temperaments.
🔵 Indigo Dome
　Species skilled in magic and mental manipulation, such as witches and spirits. Wards are in place for magic control, creating a quiet and secluded atmosphere.
⚪️ Pale Dome
　Unconventional beings such as revenants and amorphous creatures. The environment itself is peculiar, offering the most inexplicable and highest degree of freedom.