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Shinobu Takeuchi becomes a homeroom teacher at Ooki Elemntary School in Osaka, Japan. Shinobu loves mystery novels and can't stand things when it doesn't turn out right. Shinobu then attempt... Read allShinobu Takeuchi becomes a homeroom teacher at Ooki Elemntary School in Osaka, Japan. Shinobu loves mystery novels and can't stand things when it doesn't turn out right. Shinobu then attempts to solve a difficult cases that even detectives can't solve.Shinobu Takeuchi becomes a homeroom teacher at Ooki Elemntary School in Osaka, Japan. Shinobu loves mystery novels and can't stand things when it doesn't turn out right. Shinobu then attempts to solve a difficult cases that even detectives can't solve.