  A novel framework is proposed for embedding the natural inflation into the
type IIA superstrings compactified on a Calabi-Yau (CY) three-fold. Inflaton is
identified with axion of the Universal Hypermultiplet (UH). The other UH
scalars (including dilaton) are stabilized by the CY fluxes whose impact can be
described by gauging of the abelian isometry associated with the axion, when
the NS5-brane instanton contributions are suppressed. Then the stabilizing
scalar potential is controlled by the integrable three-dimensional Toda
equation, and leads to spontaneous N=2 SUSY breaking. The inflationary scalar
potential of the UH axion is dynamically generated at a lower scale in the
natural inflation via the non-perturbative quantum field effects such as
gaugino condensation. The natural inflation has two scales that allow any
values of the CMB observables $(n_s,r)$.
