  We intend to introduce classically a special Lagrangian density in such a way
that, firstly, it leads to a special non-topological solitary wave solution,
secondly, the stability of that is guaranteed properly, and thirdly, its
dominant dynamical equations reduce to the standard nonlinear Klein-Gordon
equations. For these purposes, we have to consider a new term in the Lagrangian
density, whose role is like a massless phantom that surrounds the special
solitary wave solution and resists any change in its internal structure.
