Over a year had passed.
One day, Meredith suddenly realized, they had stayed in "historical re-enactment" for over a year; if the time flow in "historical re-enactment" was the same as in the real world, didn't that mean... they had been missing for over a year?
Members of the Bronze Guild came to this realization as well and after gathering to discuss it, they concluded that the time flow in "historical re-enactment" must be different from that in the real world.
The exact ratio was unknown to them, but they speculated that if they couldn't leave "historical re-enactment" before dying of old age, it was very likely they would actually die of old age there.
Knowing this, the members of the Bronze Bounty Guild unanimously decided that if they still hadn't found the key person who triggered "historical re-enactment" after thirty years, they would tell the mission of The Lost Golden City to the young master.
To help them break free from their predicament.
