Plot: Mukai is taking on the role of Eisuke, a former bassist of a rock band who gave up his music dreams to carry on the tradition of his family’s French restaurant. The show will involve a love triangle as Kuninaka and Takimoto play rivals for Eisuke’s heart.
Kuninaka has been cast as Eisuke’s older girlfriend Maria, who works at a bank. She is shocked to learn that Mukai has abandoned his music to devote himself to the restaurant, leading her to uncertainty about their relationship. Takimoto’s character is a 20-year-old college student named Chie who comes from a farming family. Although she initially had a bad impression of Eisuke, she begins to develop feelings for him after tasting his cooking.
SMAP’s Inagaki will play Tokio, the owner of a competing French restaurant. In the past, he was fond of the restaurant that Eisuke’s mother ran, but after she passed away, he deceived Eisuke’s father and bought out the restaurant’s chefs and staff. Knowing of Eisuke’s ability as a chef, Tokio views him as a rival.
Eisuke’s friends, who were part of his band ROCKHEAD, are being played by Tsukamoto (guitarist) and Miura (vocalist). Both of them help Eisuke with his restaurant. -- Tokyograph

Seri terakhir dari Trilogi Gokusen yang menceritakan seorang guru bernama Yamaguchi Kumiko (Yukie Nakama ). Yamaguchi adalah seorang penerus generasi ke-4 keluarga Oedo, sebuah keluarga Yakuza yang sangat berpengaruh. 

Tapi Yamaguchi ( akrab dipanggil Yankumi ) tidak ingin meneruskan usaha keluarganya. Malah justru bercita-cita ingin menjadi seorang guru. Namun nasibnya selalu harus menjadi guru bagi kelas yang terdiri dari anak-anak berandalan. Dengan pengalamannya sebagai seorang Yakuza, Yankumi mengajar kelas-kelas ini. Namun terlepas dari itu semua, Yankumi adalah guru yang beda dari guru umumnya. Yankumi selalu mengutamakan kepentingan murid-muridnya dan selalu membela muridnya yang mengalami masalah. Berkat dedikasinya dan hasil didikannya yang ekstra keras, akhirnya hingga ke seri terakhir ini, murid-muridnya selalu ingat akan ajarannya hingga mereka lulus dan masuk ke dunia kerja. 

Di Gokusen the Movie ini, akan muncul sejumlah aktor papan atas dari film Gokusen terdahulu seperti Yuma Ishigaki, Hiroki Narimiya, Waki Tomohiro dan Shun Oguri dari Gokusen I, Hayami Mokomichi, Kazuya Kamenashi, Teppei Koike dan  Keisuke Koide dari Gokusen II serta Haruma Miura, Miura Shohei, Yuya Takaki dan Hideo Ishiguro dari Gokusen III. 

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