Lennon Yakura, 23 years old, was born in Osaka. After graduating from a junior college, he joined the National Security Investigation Bureau. His father is the head of the Kansai Branch Security Division of the Bureau of Investigation. His mother is an American lawyer, although she has Japanese citizenship. He has a strong sense of justice, educated by his serious and strict father. He belongs to the Special Task Force of the Special Investigation Department. Chiaki Tsukada, who is missing after being captured by the Joken, was his supervisor when he joined the Bureau. She takes her mentor's teachings to heart and stands up to him. The fierce battle between the strongest female warrior and the Women's Torture Institute is about to begin.