The Bodyguard I Married Owns the Security Empire

A female tech CEO forced into a business marriage is saved by a night security guard during an elevator crash. She falls for him at first sight and enters a rushed contract marriage with him to fend off a hostile acquisition. After marriage, she gradually discovers this quiet, unassuming man masters combat and hacking, foils assassinations and commands global capital—he is the king of a security empire presumed dead four years ago.