Seigi no Mikata (Ally of Justice)

Summary by MyDramaList:
15-year-old Yoko, a young girl who is constantly tormented by her self-centered and devilish older sister Makiko, who works for a government office after having graduated from a famous university. But 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."
Music: Okumura Hatsune - Honto wa ne
**I DO NOT OWN THE MUSIC AND VIDEO**