Seigi no Mikata (正義の味方, Ally of Justice) is a story first published by Shueisha as a manga by Hijiri Chiaki, and then made into a short-running TV drama in 2008 by Nihon Television, directed by Satoru Nakajima.
Only Yoko and her parents know her sister's true nature, while other people are fooled by her unbelievable good luck.
15-year-old Yoko is constantly tormented by her self-centered and fiendish older sister Makiko, who works for a government office after having graduated from a famous university.
Despite her ill nature, Makiko's actions tend to somehow make things better for those around her, causing others to praise her as an "ally of justice."
The series ends with Yoko finally talking to Riku before he departs for Osaka and Makiko giving birth to her baby.