The uncanny silence by the showrunners has let down the fans of the show.
Nene Yashiro has made a pact with "Hanako-san of the Toilet," aka Hanako-kun, to hold off the curse that has been placed on her.
So it is a good bet; the next season will likely pick up from there and explore the human-ghost divide.
The cost of a toilet can vary dramatically depending on its features and design.
Therefore, they have not yet received any indication as to when it will be seen by others.
At present, at the beginning of season 2, the theme and the end of Season 2 are not yet publicly revealed.