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Kurumi Nanba (Ai Hashimoto) is a student majoring in math at prestigious university. She's viewed as a weirdo due to her poor communication skills, but having a genius level intellect. Meanwhile, Tatsuhiko Handa (Kengo Kora) is a young detective. Kurumi Nanba and Tatsuhiko Handa work together to solve difficult cases including a series of bomb explosions, a locked-room murder and corporate blackmail.