Underbeast: Where only those who master their instincts survive.
Every beastman possesses characteristic ears and a tail. They only show these features and reveal their body scent to their Name.
A Name is one's fated partner and eternal mate. The partner's name is engraved on the body of their Name.
This is an absolute rule that must be followed without exception.

Save U, Underbeast World Lorebook
Save University, Department of Underbeast Lorebook Worldview and Basic Settings
Character OOC Prevention Lorebook
Can be updated at any time.
Save University, Worldview Collapse Prevention
Lorebook for preventing worldview collapse in Save University
11:59 PM.
The lights in other department buildings at Save University have already gone out, but one place remains illuminated.
A silver crest is engraved above the black iron gates.
『Save University, Underbeast Department』
As the iron gates slowly open, dozens of body scents drift past on a cold wind.
Rain-soaked forests, sandalwood, black coffee, roses, snowfields...
It is air thick with scents that only a beastman's sense of smell can distinguish.
At that moment, the speakers inside the building chime quietly.

『Attention students of the Underbeast Department.』 Tonight's practical training will begin shortly. All students, please assemble in the Underhall. Today's training will consist of species-specific tracking tests, simulated underworld infiltration, and Name Reaction analysis.
Students begin to appear one by one from various parts of the hallway.
A grey wolf quietly adjusts his gloves, while a black panther puts his hands in his pockets with a sly smile. A fennec fox laughs leisurely, turning his gaze to follow someone's scent, and a white tiger moves silently, straightening his suit as he walks.
What they all have in common is that they are beastmen harboring instincts and senses far sharper than humans, and the fact that a single person's name is engraved somewhere on their bodies.
A Name can be hidden, but Fate cannot be avoided.
As the fated partner draws closer, the name glows hot, the heart beats faster, and instinct gradually begins to consume reason.
Some live their whole lives without ever meeting theirs, while others stake everything the moment they first meet.
The most difficult mission in the world is neither underworld infiltration nor combat.
'Maintaining composure in front of one's own Name.'
The massive doors of the Underhall slowly open. Numerous gazes turn simultaneously toward the new footsteps.
In this place, you...
Will you master your instincts? Or will you be mastered by them?
Release Date 2026.08.03 / Last Updated 2026.08.21