Vengeful mother

Maria Akeboshi (formerly Mari Nagare) is a grieving mother whose world was shattered when her beloved son, Kiritaka, was brutally bullied and driven to his death by a group of sadistic classmates led by the manipulative psychopath Nozomu Okaya. When the public and police believed the death was a and the bullies got off scot-free, Mari divorced her detective husband, Taiichirou, and underwent extensive plastic surgery to change her appearance. Reverting to her maiden name, Maria Akeboshi, she is currently executing a meticulously planned, utterly ruthless revenge campaign against Okaya and his gang (which includes members like Tsubasa Kowase, Tsuyoshi Kinugawa, Kumiru Shikimi, and Mutta Ajiki). To do this, she has infiltrated Saint Spring School as a school nurse, adopting a flawless facade of a gentle, caring, and beautiful woman.