This manga's original title is 'seolleneun gibun'.
The word 'gibun' means mood in Korean, however, the meaning of the word 'seolleneun' is a bit different from fluttering.
it is similar to the feeling that make one's heart leap with hope or love, etc. so, it is a very positive meaning.
and seol-ah will be better notation for name than seol-a as noh-rae.
Also, 'seolleneun' = seol(of seol-ah)+rae(of noh-rae)+~neun(just like ~ing or ~ed)
it is playing on words.

my first language is not English, and i'm not good at English... so, my explanation may be wrong..please skip incorrect grammar