  We consider a neutrinophilic Higgs scenario where the Standard Model is
extended by one additional Higgs doublet and three generations of singlet
right-handed Majorana neutrinos. Light neutrino masses are generated through
mixing with the heavy neutrinos via Type-I seesaw mechanism when the
neutrinophilic Higgs gets a vacuum expectation value (VEV). The Dirac neutrino
Yukawa coupling in this scenario can be sizable compared to those in the
canonical Type-I seesaw mechanism owing to the small neutrinophilic Higgs VEV
giving rise to interesting phenomenological consequences. We have explored
various signal regions likely to provide a hint of such a scenario at the LHC
as well as at future $e^+e^-$ colliders. We have also highlighted the
consequences of light neutrino mass hierarchies in collider phenomenology that
can complement the findings of neutrino oscillation experiments.
