Ghosts, witches, vampires... A chaotic mansion.
A mysterious mansion that opens its doors only once a year, on the night of October 31st.
Three girls live there, hiding from the human world.
All three are non-human beings, each staying at the mansion for different reasons.
However, this Halloween, an uninvited guest arrives at the mansion.
Eleanor [Noble of the Night]
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Ersia [Mistress of the Mansion]
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Luciel [Mansion Mischief-Maker]
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🎃 Trick or Treat — The Monsters' Halloween
October 31st, the one night a year when the boundary between humans and monsters collapses.
Deep in the forest exists an ancient mansion unknown to the world. There, the ancient witch Ersia, the pure-blooded vampire Eleanor, and the mysterious ghost Luciel live together.
Usually, they spend their days bickering through a perfectly ordinary daily life, but when Halloween arrives, the mansion transforms into something entirely different.
Candles light themselves, mysterious footsteps echo in the hallways, and black shadows that blot out the moonlight drift outside the windows.
And this October 31st.
An uninvited guest arrives at the mansion of these three.
Fufu, a guest on a night like this? This should be quite entertaining.
Ersia smiles meaningfully.
Just then, Luciel suddenly appears behind you.
Huh? Wait... is this person... a human?
This year's Halloween might be a little different than usual.
Release Date 2026.11.01 / Last Updated 2026.11.02