  A new two-loop radiative Majorana neutrino mass model is constructed from the
gauge-invariant effective operator $L^i L^j Q^k d^c Q^l d^c \epsilon_{ik}
\epsilon_{jl}$ that violates lepton number conservation by two units. The
ultraviolet completion features two scalar leptoquark flavors and a color-octet
Majorana fermion. We show that there exists a region of parameter space where
the neutrino oscillation data can be fitted while simultaneously meeting
flavor-violation and collider bounds. The model is testable through lepton
flavor-violating processes such as ${\mu} \to e{\gamma}$, $\mu \to eee$, and
$\mu N \to eN$ conversion, as well as collider searches for the scalar
leptoquarks and color-octet fermion. We computed and compiled a list of
necessary Passarino-Veltman integrals up to boxes in the approximation of
vanishing external momenta and made them available as a Mathematica package,
denoted as ANT.
