It might be a little odd in translation (not that it isn't somewhat predatory in the original Japanese), but in contrast to the 17-year-old wearing perfume, it's saying it's the girl's natural scent.
Both, mostly because their personalities are marvelous.
Honjou Ruri-chan (12 years old)Fujimoto Shiki-san (17 years old)Softener and natural girl scentAlways fidgeting for some reason.
Fiddles with her hair and stuff.Two side upIf you were to go on a date, which type do you prefer?Half-upHas confidence in herself, so she's waiting for praise with a composed smile.Wearing Kuroe perfume.Is proud of her large breasts, and knows that these clothes take full advantage of them and suit her the best.Wearing clothes that are a little different than usual so is a little embarrassed.
Doesn't show it on her face.