A Certain Scientific Accelerator

The story unfolds with the top-ranked esper from Academy City, Accelerator, struggling to recover in the hospital after rescuing Last Order and sustaining a bullet wound. However, his recuperation is disrupted by the appearance of an enigmatic girl carrying a photograph of Little Sister, a young clone of Last Order. This unexpected visitor pleads for Accelerator's assistance as they find themselves entangled in the web of Disciplinary Action, a clandestine organization with a dark agenda that poses grave dangers not only to Last Order but also to Academy City and potentially the entire world. As Accelerator grapples with his own moral compass and encounters a variety of formidable adversaries, he must navigate this complex situation to ensure the safety of those he holds dear while uncovering the true motives behind Disciplinary Action's malevolent schemes.