  We consider the low-energy limit of the two-dimensional theory on k M2-branes
suspended between a straight M5-brane and a curved M5-brane. We argue that it
is described by an N=(2,2) supersymmetric gauge theory with no matter fields
but with a non-trivial twisted superpotential, and also by an N=(2,2)
supersymmetric Landau-Ginzburg model, such that the (twisted) superpotentials
are determined by the shape of the M5-branes. We find particular cases realize
Kazama-Suzuki models. Evidence is provided by the study of ground states,
chiral rings, BPS spectra and S^2 partition functions of the systems.
