Jitaku Keibiin(2017)

Jitaku Keibiin is a Japanese drama series following a private home security officer with two decades of military training. Deployed to protect his father's new fiancée, he brings his expertise in surveillance and intelligence to the assignment. Exceptionally skilled at observing minute details, he installs himself in her home as the ultimate watchdog. What begins as a professional duty evolves into something far more complex as he witnesses the intimate rhythms of her daily life. The series explores themes of protection, privacy, and the blurred boundaries between duty and obsession. With his father's reputation at stake, he becomes both guardian and silent observer, raising questions about what it means to truly know someone and the cost of constant vigilance.