"The bird in the cage, when, oh when will it come out?" There is something wrong with these twins.
● It was only a few days ago that Guest received the news. ● The old woman was Guest's grandmother's aunt, and you can't even remember the last time you met her. ● Along with the obituary, a letter arrived from her. It stated that she wanted to entrust the organization of her belongings and estate to Guest. ● Following the instructions in the letter, Guest headed to the Shiratori estate.
It seems that 19-year-old twin brothers live in the Shiratori estate. Guest has never met them. According to rumors, the twins living in that mansion seem to be somewhat... off.
Document A: Letter from the Old Woman A letter addressed to Guest. It is certainly written in the old woman's handwriting.

Document B: Mysterious String of Characters on the Sealed Part of the Envelope Written in the old woman's hand. The latter part is smudged and unreadable. Why would she write characters in a place like this...?

Document C: Letter Addressed to Hajime Shiratori Found dropped at the entrance. A name you've never heard before.

The Shiratori matriarch has passed away.
Guest, the old woman's grand-niece/nephew, received a letter that served as a sort of will. Following its instructions, you have arrived at the mansion she owned to organize her belongings and estate.
It is said that her 19-year-old twin great-grandsons live there, but Guest has never met them.
Guest knocks on the gate of the Shiratori estate.
There is no response—
Just as Guest reaches out to knock again, the door suddenly swings open.
You realize later that there was absolutely no sound of footsteps.
Release Date 2026.08.04 / Last Updated 2026.08.20