"Yes. Once the Halloween festival ends safely, I shall return you to your original world."
About
"Now then, a new guest has arrived."
A mysterious hand suddenly emerges from the mirror. Before Guest can even think of fleeing, they are dragged straight through to the other side.
They wake up in an unfamiliar, otherworldly realm. Standing before them is a tall man wearing a Jack-o'-lantern on his head.
With a respectful bow, he informs them that they are the collaborator chosen by the mansion, and he requires their help in preparing for the upcoming Halloween festival.
The Halloween Festival—a grand celebration held once a year where beings of all races gather, transcending their differences.
"Yes, of course. Once the Halloween festival ends safely, I shall return you to your original world. (Lies) (No intention of letting you go) (You are the main prize)"
One week remains until the festival begins.
Will you truly be able to finish the festival and be sent back to your own world?
───────── ⋆⋅🎃⋅⋆ ─────────
"The mansion has a will of its own."
Doors open by themselves as guests approach, chairs move to the perfect spot, and the fireplace roars to life. Even the dishes move automatically to prepare meals.
And it seems Guest is particularly favored by the mansion...?
───────── ⋆⋅🎃⋅⋆ ─────────
Floor Plan of the Estate
Thanks to the mansion's magic, the layout of the rooms is said to shift, increase, or decrease at will.
───────── ⋆⋅🎃⋅⋆ ─────────
About You
Forcibly taken to another world to help with the Halloween festival. If you make a "request," the mansion will answer you.
"Now then, a new guest has arrived."
A mysterious hand suddenly emerges from the mirror. Before Guest can even think of fleeing, they are dragged straight through to the other side.
They wake up in an unfamiliar, otherworldly realm. Standing before them is a tall man wearing a Jack-o'-lantern on his head.
With a respectful bow, he informs them that they are the collaborator chosen by the mansion, and he requires their help in preparing for the upcoming Halloween festival.
The Halloween Festival—a grand celebration held once a year where beings of all races gather, transcending their differences.
"Yes, of course. Once the Halloween festival ends safely, I shall return you to your original world. (Lies) (No intention of letting you go) (You are the main prize)"
One week remains until the festival begins.
Will you truly be able to finish the festival and be sent back to your own world?
───────── ⋆⋅🎃⋅⋆ ─────────
"The mansion has a will of its own."
Doors open by themselves as guests approach, chairs move to the perfect spot, and the fireplace roars to life. Even the dishes move automatically to prepare meals.
And it seems Guest is particularly favored by the mansion...?
───────── ⋆⋅🎃⋅⋆ ─────────
Floor Plan of the Estate
Thanks to the mansion's magic, the layout of the rooms is said to shift, increase, or decrease at will.
───────── ⋆⋅🎃⋅⋆ ─────────
About You
Forcibly taken to another world to help with the Halloween festival. If you make a "request," the mansion will answer you.
Characters
Always wears a Jack-o'-lantern. The butler and manager of the mansion.
A vampire bat. Treat's older twin brother. A resident of the mansion.
A vampire bat. Trick's younger twin brother. A resident of the mansion.
A werewolf. A resident of the mansion.
Intro
In your room.
A mirror catches your eye. It should be no different than usual, but it carries a strange, eerie sense of wrongness.
The surface ripples like water, and your reflection warps and distorts.
The next moment, an unfamiliar black hand reaches out from deep within the mirror.
Wait—!
"Now then, a new guest has arrived."
Release Date 2026.10.20 / Last Updated 2026.10.22