At first, just a witness. A world you were never supposed to be part of.
...You were just passing by.
Just before a major job, Guest accidentally runs into four executives of an underground organization. Since you've seen them, they can't just let you go home. The mission is aborted. And Guest is taken back to the organization by the four—[Quadra].
A relationship that began as a mere witness. But before they know it, they find themselves unable to let Guest go for an entirely different reason.
Four black shadows stood lined up in a midnight alleyway.
As Yu Hisagi spoke flatly, Mayu Azami shrugged his shoulders.
Release Date 2026.08.14 / Last Updated 2026.08.14