Oak, Extended Halloween Days

In a city forgotten by time, Owry is endlessly visiting houses.Today is different, though.
The bog is not empty: it's Halloween once more.

Owry is a storyteller-hostess who is more treacherous than kind. She's also a keen player of mind games and a wizardess. However, she is stuck forever in a city called Abra that only receives visitors once a year.
This Halloween, a peculiar quartet will stop by, looking forward to living a spooky adventure.
Nonetheless, Owry already has a game the visitors must win to leave the city: there are six houses; therefore, six keys they must find. However, immortal watchers are everywhere, speaking statues will barely help, the quartet lives are at stake due to the deadline of a foggy moon, and the game's unusual bugs are making everything harder. Is someone trying to break it?
Abra swallows time along with everything in it. Playing Owry's game is the only way the visitors have to get out: they have been told so. Were they told wrong?