  Einstein gravity at $D\rightarrow 2$ limit can be obtained from the
Kaluza-Klein procedure by taking the dimensions of the internal space to zero
while keeping only the breathing mode. The resulting scalar-tensor theory can
be further reduced to JT gravity or the Liouville CFT at the large central
charge limit, bridging the two important 2d models. We study the general
solutions of the theory, including black holes and wormholes for both positive
and negative cosmological constants. We obtain the on-shell action of the
nearly AdS$_2$ and show that for suitable boundary slices, the Schwarzian
action governs the leading-order dynamics at the finite boundary cutoff in
later time. For positive cosmological constant, we find that the scalar is well
defined on the 2-sphere.
