This paper introduces a novel investigation into the additive structure of primes that transcends the classical framework of the Goldbach Conjecture. Standing on the shoulders of Christian Goldbach's foundational insight regarding the sum of primes (1742) and Sophie Germain's pioneering work on special prime pairs, our inquiry addresses a qualitatively distinct problem: the existence of three simultaneously prime numbers (p, q, r) satisfying the relation p = q + r − 1. Unlike classical Goldbach verifications---notably the monumental work of Oliveira e Silva et al. up to 4 × 10¹⁸, which confirms decompositions for all even integers without filtering for the primality of the predecessor---this work isolates the specific subsequence where p is also prime. This restriction reveals a hidden arithmetic architecture previously unexplored, demonstrating that the behavior of primes within this subset diverges significantly from the general case of even numbers.Far from being a mere replication of existing results, this study leverages the asymptotic machinery of G.H. Hardy and J.E. Littlewood (1923) to uncover structural anomalies within this prime subsequence. By applying their singular factor S(n) to this restricted domain, we discover that it does not average to unity as implicitly assumed in the general literature, but converges to a previously unknown constant S̄∞ ≈ 1.74273. We provide a rigorous proof of this convergence using Dirichlet's theorem on arithmetic progressions (1837) and the Chinese Remainder Theorem, demonstrating that the distribution of primes in this context possesses a unique "additive richness" distinct from the general case due to a biased density of divisors. Furthermore, we integrate the analytic depth of Bernhard Riemann (1859) and Hans von Mangoldt (1895) by utilizing the explicit Riemann–von Mangoldt formula to define a restricted Chebyshev function Ψ*(x), linking the oscillatory behavior of our multiplicity function to the zeros of the Riemann zeta function ζ(s).This synthesis of classical analysis and new combinatorial data yields seven original contributions, now supported by a robust, bug-corrected computational verification using a modular Google Colab framework with checkpoint recovery. The execution analyzed 664,574 primes up to 10⁷, correcting previous algorithmic filters that generated false positives, and conclusively confirming: (1) A groundbreaking taxonomy classifying primes into three disjoint classes: Mirror (M), Anchor-3 (A), and Orphan (O), formally characterized via the von Mangoldt function Λ(n), (2) The unconditional Mirror Gap Theorem, proving that gaps between consecutive Mirror Primes (> 3) are divisible by 12, (3) The Prime Multiplicity Conjecture (N(p) ≥ 2 for p > 11), computationally verified for all 664,574 primes in the range with zero violations, (4) The derivation of a new prediction law (Law 3) with a Root Mean Square Error (RMSE) of 0.0205, representing an improvement of over 94% compared to the classical Hardy–Littlewood formula (RMSE ≈ 0.374), and achieving 99.84% coverage within a ±30% threshold. (5) The identification of the universal constant S̄∞ = ∏_{q>2}(1 + 1/((q−1)(q−2))) ≈ 1.74273, resolving why empirical constants in this domain systematically deviate from standard twin-prime predictions, (6) A systematic characterization of these classes via the von Mangoldt function, including a class-conditional decomposition of the Goldbach–Λ sum, (7) A formal proof establishing the finiteness and exact Euler product form of S̄∞, converting an empirical discovery into a theorem. Statistical analysis via bootstrap resampling (n = 2000) confirms that the observed empirical constant Ĉ ≈ 1.3301 lies strictly outside the 95% confidence interval of the classical twin-prime constant 2C₂ ([1.3289, 1.3314] vs. 1.3203), with the deviation rigorously explained by the structural inequality S̄∞ > 1. In conclusion, this work does not merely verify old conjectures but defines a new territory in additive number theory. By repurposing the legendary tools of Goldbach, Germain, Hardy, Littlewood, Dirichlet, Riemann, and von Mangoldt, we demonstrate that the subsequence of primes holds its own unique constants, laws, and structural theorems, marking a significant and quantifiable departure from the behavior of generic even integers.