@NightWorker Yea, she should probably have been talking through a microphone or a separate hole that she'd close after herself, but maybe the tank got damaged when it was moved into someones home (or it has been slightly manipulated so as to not be as scary for the normal meditation guests). Lowering her head so both ears are beneath the waters surface should probably be good enough extra insulation as long as there's no more louder noices.
Page 6 is glorious. I have no words
I love their interaction. That dialogue when Marika is in the deprivation tank is so intimate. @Eraviel What? I think I need to read up on my lighthouse centered manga to get that reference.
Thank you for the translation. This really is an amazing story. I hope some US licenser will publish physical copies someday.