Special geometry on the moduli space for the two-moduli non-Fermat Calabi-Yau

We clarify the recently proposed method to compute a Special K"ahler metric on a Calabi-Yau complex structures moduli space that uses the fact that the moduli space is a subspace of specific Frobenius manifold. We apply this method to computing the Special K"ahler metric in a two-moduli non-Fermat model which has been unknown until now.