  The hybridization of magnetism and superconductivity has been an intriguing
playground for correlated electron systems, hosting various novel physical
phenomena. Usually, localized d- or f-electrons are central to magnetism. In
this study, by placing a PTCDA (3,4,9,10-perylene tetracarboxylic dianhydride)
molecular monolayer on ultra-thin Pb films, we built a hybrid
magnetism/superconductivity (M/SC) system consisting of only sp electronic
levels. The magnetic moments reside in the unpaired molecular orbital
originating from interfacial charge-transfers. We reported distinctive
tunneling spectroscopic features of such a Kondo screened pi-electron impurity
lattice on a superconductor in the regime of TK>>delta suggesting the formation
of a two-dimensional bound states band. Moreover, moir\'e superlattices with
tunable twist angle and the quantum confinement in the ultra-thin Pb films
provide easy and flexible implementations to tune the interplay between the
Kondo physics and the superconductivity, which are rarely present in M/SC
hybrid systems.
