Because they... don't have the key.
Under the sparse moonlight, Baichuan City was doused in the light of the moon. Casio's new residence is still within the urban area, but relatively far from the Central Street District. There should be a station about a few hundred meters away along the main road.
Beyond that is a complex network of alleys, that has scattered buildings and sporadic dim lights through the windows. The Red Eye Level Shadow Demon has now morphed into a half-human, half-dark creature, its power at its peak.
It was clear that it was no longer human. Its arms gradually elongated and extended; its ten fingers were long and thin, with sharpened white nails that appeared like blades.
With every step hitting the ground, its body would catapult five or six meters forward, like a black phantom.
And behind the Red Eye Level Shadow Demon,
another towering shadow was leisurely trailing behind.