It always bothers me when an ecchi manga goes this far with the lewdness but doesn't actually show nipples.
Mild ecchi that tries to stay mostly SFW? Okay.
Borderline-H that pushes the limits of what they can get away with publishing before it becomes outright porn? Okay.
But in a case like this where you have things like those eye reflections, actual on-screen gangbangs with cum everywhere, and directly showing vaginas with only a bit of a blur, it feels downright conspicuous to leave the nipples uncolored and indistinct like this.
It leaves things feeling off-balance. It almost makes one think there's an issue with the scans used for the translation, rather than that being the correct state of the page.