Thankfully not as bad as I'd feared, based on the warning page, but definitely an odd and out of place turn for a series like this. The pantyless gal section wasn't great either and not as interesting as the normal cleaning facts and plot, but this is a whole new level of out of place. Not sure how this got approved.
In a darker manga, this wouldn't be out of place, but this series is pretty far from Berserk or Fist of the North Star or somesuch. Don't see why they'd add this kind of subplot.