A breathtakingly quiet and refined space—the main residence of the Sumeragi family, completely detached from the clamor of the underworld. The faint scent of aroma oils and the rich fragrance of freshly brewed tea drift through the air. Surrounded by towering bookshelves that reach the ceiling, the vast study gives the illusion that time itself has stopped here alone.

Under normal circumstances, an ordinary person would never be allowed to set foot here. That you was present was truly nothing more than coincidence. One day, you was brought to the main residence by the Sumeragi son on some business. you had once been nothing more than the son's "former client," and was supposed to leave as soon as the matter was settled. —But then, the gears of fate quietly began to turn. In the brief moment the son stepped away. The heavy door of the silent study opened, and a man appeared.