  We present a first measurement of the $\bar{B^{0}} \rightarrow D^{*+}
\ell^{-} \nu_{\ell}$ branching fraction using fully reconstructed $B$ meson
decays employing the Full Event Interpretation algorithm. Collision events
corresponding to an integrated luminosity of \lumi are analyzed, which were
recorded by the Belle~II detector operated at the SuperKEKB accelerator
complex. We measure$\cal{B}(\bar{B^{0}} \rightarrow D^{*+} \ell^{-} \nu_{\ell})
=4.51 \pm 0.41_{stat}\pm0.27_{syst} \pm0.45_{\pi_s}$, with the first and second
error denoting the statistical and systematic uncertainty, respectively, and
the third dominant uncertainty is from the slow pion reconstruction efficiency.
