ZEUSO-005 - Overwhelming I-cup majesty, Yuuki Chika's insane volume

*Chika-chan's plump busty body is worth seeing. In the first half of the chapter, there is a scene where the whole body is oiled, and the shiny breasts are the most erotic. It's hard to believe that she was 18 years old at the time of the photo shoot, and her body is truly outrageous. However, it was a shame that there was a lack of movement overall, and the shaking of the breasts was modest. Since the material is perfect for a wank body, I think if she had done a simple triangle bikini + full body oil massage and pie massage, it would have been a masterpiece.

Why is this rated R-18? It feels like a standard IV (Image Video). Did I miss something?