Talk:Birthday-Death Disease/@comment-3267900-20180714171535/@comment-34688569-20190714220833

But we must remember that the time flows differently between the surface and deep layers of the abyss. It is even one of the reasons for Riko's optimism in the search for her mother.

Except for the time Riko expend in the Nanashi hideout, all the history of Bondrewd arc and the current 6th layer arc comprised just few days (they even almost had no "night" sleep, the story is almost without any time-skip).

It matches if just some weeks or months have passed in Orth (especially when Chief meets Ozen in her base), and not long years.