Example of a binary with M_d = 0.5 M_⊙, M_a = 0.8 M_⊙, and P_i = 0.84 hours, where a thermonuclear explosion occurs in the WD (accretor). The background colors yellow, blue, and green represent the gravitational-wave inspiral phase (GW-inspiral), H mass transfer phase (H-MT), and He mass transfer phase (He-MT), respectively. Panels (a) through (f) show the evolution of various parameters: (a) Mass Evolution: M_a (accretor) and M_d (donor); (b) Orbital Period Evolution; (c) Radius Evolution: R_d (donor’s radius) and R_roche, d (Roche radius of the donor); (d) mass transfer rate; (e) Evolution of surface mass fraction: X_H (hydrogen) and X_He (helium) in the donor; (f) He Mass on the Accretor; (g) Luminosity Evolution: L_a (accretor), L_d (donor), and L_accretion (accretion). The accretor gains mass at the rate of ∼10⁻⁸ M_⊙ yr⁻¹, resulting in the He ignition in the He layers denser than the assumed critical density for detonation (> 10⁶ g cm⁻³).