  We present the first fully unrestricted microscopic calculations of the
primary fission fragment intrinsic spins and of the fission fragments' relative
orbital angular momentum for $^{236}$U$^*$, $^{240}$Pu$^*$, and $^{252}$Cf
using the time-dependent density functional theory framework. Within this
microscopic approach, free of restrictions and unchecked assumptions and which
incorporates the relevant physical observables for describing fission, we
evaluate the triple distribution of the fission fragment intrinsic spins and of
their fission fragments' relative orbital angular momentum and show that their
dynamics is dominated by their bending collective modes, in contradistinction
to the predictions of the existing phenomenological models and some
interpretations of experimental data.
