Undercover Heat (Omegavers) #English versions

The mission was to steal her secrets. The outcome was losing her soul.
In the neon-drenched underworld of modern Tokyo, Senn Midorikawa is a ghost—a high-ranking Alpha spy for a clandestine government agency. To infiltrate the "Kurowasu" Yakuza syndicate, she must suppress her lethal instincts and pose as "Shiro," a fragile Omega hostess. Her target: Renna Kaido, the ruthless Yakuza matriarch rumored to be an Enigma—a rare predator capable of rewriting an Alpha’s very biology.
From their first encounter amidst the scent of Agarwood and Rum, the game of cat and mouse begins. But Renna isn't fooled by the synthetic scent of lilies. She sees the predator beneath the silk kimono and decides to play a much darker game.