  Several binary systems, composed of a star and a compact object, have been
detected in the GeV-TeV range. Several systems have been observed but only a
handful of sources have shown emission at those energies. Here, we present the
observations conducted by MAGIC of different {\gamma}-ray binary systems. On
one hand, we show the latest studies on the binary system LS I +61 303, which
displays variability on different timescales. With the latest MAGIC
observations, we will try to shed light on our understanding of this source, by
presenting super-orbital and multi-wavelength studies. On the other hand, we
show the observational results on the binary system HD 215227. This source has
been proposed as a new {\gamma}-ray binary for being spatially coincident with
the gamma-ray source AGL J2241+4454 detected by AGILE at E >100 GeV.
