GTO: Fall Special by Imai Kazuhisa

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The special will be set several months after the events of the drama. "Onizuka" learns of the imminent closure of the "Smile Duck" orphanage ("White Swan" in the original manga) due to a certain city development plan and some conflicts of interest for the politicians involved. Of course, he cannot let that happen, and together with his students from class 2-4, he will do everything possible to protect the orphanage.