  We initiate a conformal bootstrap program to study AdS3/BCFT2 with heavy
excitations. We start by solving the bootstrap equations associated with
two-point functions of scalar/non-scalar primaries under the assumption that
one-point functions vanish. These correspond to gravity with a brane and a
non-spinning/spinning particle where the brane and the particle do not
intersect with each other. From the bootstrap equations, we obtain the energy
spectrum and the modified black hole threshold. We then carefully analyze the
gravity duals and find the results perfectly match the BCFT analysis. In
particular, brane self-intersections, which are usually considered to be
problematic, are nicely avoided by the black hole formation. Despite the
assumption to solve the bootstrap equations, one-point functions of scalar
primaries can be non-zero in general. We construct the holographic dual for a
non-vanishing one-point function, in which the heavy particle can end on the
brane, by holographically computing the Renyi entropy in AdS/BCFT. As a bonus,
we find a refined formula for the holographic Renyi entropy, which appears to
be crucial to correctly reproduce the boundary entropy term. On the other hand,
we explain why one-point functions of non-scalar primaries always vanish from
the gravity dual. The independence of the bootstrap equations to the boundary
entropy helps us to construct gravity duals with negative tension branes. We
also find a holographic dual of boundary primaries.
