The ward-world linked to Kuruoka Tsubaki.
It was a closed-off, limited space on the scale of a city. Even its sky had a boundary. The blue of its sky was merely the real world projected on the border of the ward. Anyone on the ground who attempted to escape in an airplane or helicopter should have been turned around by the same distorted space that stopped anyone who tried to leave the city on foot.
But that “sky” was being silently invaded.
Like a stain spreading on the ceiling of an old house with a leaky roof, that “abnormality” continued to spread slowly but steadily.
Soon, a section of sky was cut away . . . and a man and woman emerged from it hand in hand.
They immediately entered freefall.
“Oh! Were we a smidgen late? Hurry up!”
“True, true! It looks like the party’s already underway!”
The two new figures—the True Caster faction, Francesca and Francois—were clasping each other’s hands like lovers as they continued to plummet upside down.

Fate/Strange Fake: Volume 6, Interlude ("As Dream and Reality are Both Illusion II")