It is known by the works of Adamović and Perše that the affine simple vertex algebras associated with G2 and B3 at level -2 can be conformally embedded into \( L_{-2}(D4). \) In this talk, I will present a joint work with Tomoyuki Arakawa, Xuanzhong Dai, Justine Fasquel, and Bohan Li on the classification to the irreducible highest weight modules of these vertex algebras. I will also describe their associated varieties: the associated variety of that corresponding to G2 is the orbifold of the associated variety of that corresponding to D4 by the symmetric group of degree 3 which is the Dynkin diagram automorphism group of D4. This provides new interesting examples in the context of orbifold vertex algebras. These vertex algebra also appear as the vertex operator algebras corresponding to rank one Argyres-Douglas theories in four dimension with flavour symmetry G2 and B3.