  We propose a radiatively-induced neutrino mass model at one-loop level by
introducing a pair of doubly-charged fermions and a few multi-charged bosons.
We investigate the contributions of the model to neutrino masses, lepton-flavor
violations, muon $g-2$, oblique parameters, and collider signals, and find a
substantial fraction of the parameter space that can satisfy all the
constraints. Furthermore, we discuss the possibility of detecting the
doubly-charged fermions at the LHC.
