  In order to raise the Higgs mass up to 125 GeV and relieve the fine-tuning
associated with the heavy s-top mass in the minimal supersymmetric standard
model (MSSM), we propose a new singlet extension of the MSSM. In this scenario,
the additional Higgs mass is radiatively generated also in a hidden sector, and
the effect is tansmitted to the Higgs through a messenger field. The Higgs mass
can be efficiently increased by the parameters of the superpotential as in the
extra matter scenario, but free from the constraints on extra colored matter
fields by the LHC experiments. As a result, the tuning problem can be
remarkably mitigated by taking low enough messenger mass (\sim 300 GeV) and
mass parameter scales (\sim 500 GeV).
