GA-321 - 100 Shades of Nipples: The Ultimate Collection

I've bought every volume since the first one, so it's a bit surreal to think I've now seen 900 pairs of breasts. Anyway, this series focuses on nipples, but I'm just a 'breast enthusiast' who isn't that interested in nipples themselves, so I enjoy it purely as a work where I can appreciate a lot of breasts. With that in mind, Volume 9 is relatively enjoyable as the recent trend of flat-chested models has eased up a bit. Though there aren't many amazing big breasts that make you instantly hard. Also, among the 100 girls, there are quite a few I've seen before. If it's someone I saw in '100 Nipples' or 'Panty Ass', it's fun to think, 'So that's what her breasts look like.' Furthermore, if it's someone I saw in '100 Slang' Vol. 9, I get a perverse thrill thinking, 'I've seen her pussy and asshole, but this is my first time seeing her breasts,' which is a nice bonus. However, there are times when I think, 'Haven't I seen her in '100 Nipples' before?'... and if so, that's a shame. But since this manufacturer shows breasts in other series like 'Slang' Vol. 7, I might have seen them there, so it's a bit unclear.