I'm a little bit puzzled, I strongly believed (and actually kinda still do or wish) that Yuka Minase has natural breasts and gifs like these https://gfycat.com/politefirsthandgnu,
https://gfycat.com/perkywholeichthyosaurs
make it pretty much impossible for them to be fake imo.
However I found this
https://gfycat.com/unhappycaninekarakul
and her sideboob looks a little bit suspicious tbh. Any opinion on that?
I watched some videos to see her boobs in various positions. To me, they might be natural. Freeones also say they are natural and they are used to model/pornstar boobs. Yuka's boobs look similar to Sakura Kirishima's, or Dillion Harper (US porn actress). She isn't slender as Julia, she has some meat (perfect amount, which can lead to big boobs).