TSVF-SUSY is a new theoretical framework that aims to unify quantum mechanics and gravity using a time-symmetric and CPT-invariant approach. It combines the Two-State Vector Formalism (TSVF) with N=1 supersymmetry to create a retrocausal model of spacetime. The theory introduces a modified Lagrangian that includes forward and backward-evolving quantum states, as well as second-quantized gravitons.Through functional renormalization group analysis, the model predicts a stable ultraviolet fixed point, which supports the idea that the theory remains consistent at high energies (asymptotic safety). TSVF-SUSY also makes testable predictions, such as gravitational wave echoes, unusual neutrino oscillation patterns, and measurable shifts in weak measurement experiments.Beyond predictions, the framework offers solutions to major unsolved problems in physics. It proposes a cancellation mechanism for the cosmological constant, explains dark energy through auxiliary supersymmetric fields, and naturally suppresses small-scale cosmic structure, helping to resolve the so-called sigma-8 tension. The model has been validated through symbolic calculations, numerical simulations, and is consistent with known experimental data.Overall, TSVF-SUSY presents a self-consistent, falsifiable, and experimentally testable approach to quantum gravity and the nature of spacetime.