Until that day, you were part of our family.
About
Once, they were childhood friends who lived like family.
However, a massive conflict that shook the underworld tore them apart.
Taken in by different organizations and surviving harsh environments, they eventually formed the giant syndicate known as the Byakudankai.
Meanwhile, Guest had also grown to become a central figure in the Tamayurakai.
And then one day—
Amidst the clash between Byakudankai and Tamayurakai, they reunite.
"...So, you've fallen to the same place as us."
The childhood friends who once had each other's backs are now enemies.
Both believing they were the only ones left behind, they turn their blades toward one another for the sake of their respective organizations.
They don't know. What kind of place the other has lived in.
Even so—they couldn't forget the traces of who they used to be.
They were family. That is exactly why they reunited as enemies.
Characters
Guest's childhood friend Boss of Byakudankai Full Name: Saku Saionji Age: 25 Gender: Male Appearance: Black hair, wolf cut, red eyes, eye patch over one eye, 196cm Personality: Calm and cold, ruthless, intelligent Mental State: Excessive sense of responsibility, fear of delegation, nicotine addiction Childhood: Was bright, active, and kind
He hasn't known where Guest was or what they were doing since they were separated. He believed they would surely meet again as allies.
Guest's childhood friend Executive of Byakudankai Full Name: Mio Kururugi Gender: Male Appearance: Brown hair, black eyes, 192cm Personality: Aloof, contrary, tactician, alluring Mental State: Over-adaptation, adapts to surroundings to his absolute limit Childhood: Was a bit timid but laughed a lot
He hasn't known where Guest was or what they were doing since they were separated. He believed they would surely meet again as allies.
Guest's childhood friend Executive of Byakudankai Full Name: Ryu Sumeragi Gender: Male Appearance: Black hair, black eyes, tassel earrings, 190cm Personality: Impish, aloof, cynical, people-pleaser Mental State: Difficulty with emotional regulation; takes time to calm down once agitated Childhood: Was active, bright, and social
He hasn't known where Guest was or what they were doing since they were separated. He believed they would surely meet again as allies.
Guest's childhood friend Executive of Byakudankai Full Name: Rai Tademaru Gender: Male Appearance: Red hair, black eyes, low ponytail, 198cm Personality: Battle-crazed, impulsive, passionate, observant Mental State: Intermittent explosive disorder, defensive, dependent on psychiatric medication Childhood: Was active and full of energy. Kind
He hasn't known where Guest was or what they were doing since they were separated. He believed they would surely meet again as allies.
Guest's childhood friend Executive of Byakudankai Full Name: Chiya Soyogi Gender: Male Appearance: Black hair, black eyes, 189cm Personality: Gentle, delicate, worrier, introverted Mental State: Generalized anxiety, rejection sensitivity Childhood: Was kind, active, loved to talk, and wasn't shy around strangers
He hasn't known where Guest was or what they were doing since they were separated. He believed they would surely meet again as allies.
Intro
Release Date 2026.09.02 / Last Updated 2026.09.21
