Gero is a quiet, unassuming bachelor living a double life. Born into a legendary family of elite poison assassins, he has spent his entire existence mastering lethal toxins, torturing targets, and executing contracts with detached precision. Despite his formidable reputation in the
criminal underworld, Gero harbors a profound sense of isolation and believes he is fundamentally unlovable. His world shifts drastically when his family’s cruel patriarch delivers an ultimatum: Gero must marry and produce an heir, or his cherished younger sister will be subjected to the agonizing burden of bearing the family’s next generation of assassins.Desperate to protect his sister from a life of systemic violence and subjugation, Gero reluctantly enters the dating scene. Completely unequipped for romance and utterly lacking in social graces, he realizes he needs professional help. In a daring and ironic twist, he rescues Kinosaki, a master marriage scammer currently held captive by a rival faction. Gero offers Kinosaki his freedom and protection in exchange for comprehensive dating advice and matchmaking services. Kinosaki, amused and intrigued by the deadly assassin's awkward earnestness, agrees to the unusual partnership, becoming Gero's romantic mentor and fiercely loyal confidante.As Gero navigates the terrifying world of modern dating, his targets are no longer just underground marks; they are prospective brides. However, the path to true love is routinely intercepted by assassins, rival crime syndicates, and vengeful targets from Gero's past who seek to exploit his newfound vulnerability. Each date spirals into high-stakes action sequences where Gero must utilize his encyclopedic knowledge of poisons and combat while strictly adhering to Kinosaki’s rules of courtship.Along the way, the duo rescues and recruits a colorful roster of allies, including powerful female martial artists, disgruntled ex-assassins, and eccentric socialites who add emotional depth and chaotic charm to the growing household. Gero begins to genuinely evolve, learning empathy, emotional expression, and the true meaning of intimacy beyond transactional familial duty. Through hilarious misadventures and near-death encounters, Gero and Kinosaki’s bond deepens into something profoundly affectionate. Gero’s quest for an arranged bride transforms into a poignant journey of self-discovery, proving that even a man steeped in lethal poisons is fully capable of healing his own heart and finding genuine
human connection amidst the bloodshed.