You sound as if were an independent phrase, but that is a nominalizer.
= "something like that"
here functions as an informal topic marker.
Thus, {} means (there is/exists) something like a sense of shame.
> "Even among girls, there certainly exists a sense of shame or something along that line, right?"
The last half is kind of redundantly wordy as you observed, but that is exactly how we chat informally -- wordy and unconcise. The point is, though, it is not at all awkward as a spoken sentence. You should not apply the grammar for the (formal) written language.