  The dynamics of the total magnetization in metallic ferromagnet is studied
theoretically taking into account the relativistic spin-orbit interaction. It
is found that its quantum dynamics is seriously influenced by the band
crossings near the Fermi energy, and sometimes the direction of the precession
can be reversed from what expected from the commutation relation
$[S^{x},S^{y}]= i\hbar S^{z}$ ($h = 2\pi \hbar$: Planck constant), i.e., the
left-handed ferromagnet can be realized.
