Mahoro, a powerful but aging battle android, as she navigates her final year of life. The season escalates the conflict with the alien organization Saint, revealing hints of a conspiracy between her former agency, Vesper, and Saint, while also delving into her complicated relationship with Suguru as her terminal condition worsens. The plot becomes more dramatic, featuring a presidential assassination, Mahoro's internal struggle with her programming, and a climactic escape to protect Suguru.