Yakusoku no NEVERLAND where did I leave off?

[dsid2814]

I was waiting for YnN to end, but I've forgotten where I left off.
They went into some house or building, that shifts time and space, and they get older and younger. I believe Ray was old and dying and was saved by a baby version of the MC.

What chapters was this around?

 

[Yatsuki]

@dsid2814 About chapter 136