  In this talk, we present our recent work on the $K\ra\pi \bar{l} l$ decays in
a combined framework of chiral perturbation theory and Large--$N_c$ QCD under
the dominance of a minimal narrow resonance structure. The proposed description
reproduces very well the experimental Br$(K^+\ra\pi^+ e^+ e^-)$ and
Br$(K_S\ra\pi^0 e^+ e^-)$. Predictions for the $K\ra\pi \mu^{+}\mu^{-}$ modes
are also obtained and we can conclude to the constructive type for the
interference between the {\it direct} and {\it indirect} CP--violation
amplitudes in $K_L\ra\pi^0 e^+ e^-$.
