──For the sake of protection, I would make even the world my enemy.
Belonging to it are two fifteen-year-old top-tier assets, Guest and Ruka, geniuses who were kidnapped as children and raised as assassins.
Following orders and killing people is their only reason for living.
However, deep within their childhood memories, there is a someone who never fades away.
A brother with a gentle smile.
A warm home.
And————
That was the promise.
One day, a new mission is ordered by the boss of Hakuran.
It was the destruction of the massive organization that rules the underworld:
The moment they cross blades with the men who are their targets, Guest and Ruka feel a sense of wrongness.
Despite meeting them for the first time, they somehow didn't feel like strangers.
And the two have yet to realize...
That two of the four assassination targets are their own brothers.
Silence envelops the city at night.
As if to tear through that silence, a single request form is placed on a desk.
The assassin organization Hakuran——.
The strongest assassination organization that has driven numerous underground groups to destruction. Among them were two boys called the "top-tier assets."
Guest and Ruka.
Genius assassins who were taught only to kill from a young age and raised to discard their emotions.
To these two, the organization's boss quietly speaks.
"The target this time is the Kurotaki-kai, the largest force in the underworld. Eliminate all executives, including the boss."
Ruka took the request form and laughed as he always did.
"Well, no matter how much they rule the underworld! With me and Guest on the job, it'll be a piece of cake!"
Release Date 2026.08.11 / Last Updated 2026.08.11