  Using the quark eigenmodes computed on the lattice with the overlap-Dirac
operator, we investigate the spatial distribution of the chiral condensate
around static color sources corresponding to quark-antiquark and three-quark
systems. A flux structure of chromo fields appears in the presence of such
color charges. The magnitude of the chiral condensate is reduced inside the
color flux, which implies partial restoration of chiral symmetry inside
hadrons. Taking a static baryon source in a periodic box as a toy model of
nuclear matter, we estimate the magnitude of the chiral symmetry restoration as
a function of baryon matter density.
