DRAMA MANIAC

Nakama Yukie as Yamaguchi Kumiko (Yankumi / Ojou / Koumichou) (Math Teacher)
Namase Katsuhisa as Sawatari Goro (School Vice Principal)
Utsui Ken as Kuroda Ryuichiro (Kumiko's grandpa / 3rd Generation Oedo Yakuza Boss)
Anan Kenji as Wakamatsu Hiro
Kaneko Ken as Asakura Tetsu
Uchiyama Shinji (内山信二) as Tatsukawa Minoru
Ryoukuni Hiroshi (両國宏) as Sugawara Makoto
Kamenashi Kazuya as Odagiri Ryu
Akanishi Jin as Yabuki Hayato
Hayami Mokomichi as Tsuchiya Hikaru
Koike Teppei as Takeda Keita
Koide Keisuke as Hyuuga Kosuke
Otoha as Shiratori Hitomi (English Teacher)
Sakai Toshiya as Inuzaka Taichi (Japanese Language Teacher)
Moto Fuyuki as Kameyama Takashi (Ethics Teacher)
Magii as Inomata Shinji (Chemistry Teacher)
Ikeda Yukiko (池田有希子) as Wanibuchi Sayuri (Music Teacher)
Azuma Mikihisa as Baba Seiga (PE Teacher)
Inoue Jun as Kurokawa Ginji (Chairman of Kurogin High School)
Tanihara Shosuke as Kujo Takuma (Teacher in Momo Girls High School)
Waki Tomohiro as "Kuma" / Kumai Teruo (Former student of Yankumi)

The continuation of the popular Gokusen series.
Several years have passed and Shirokin Gakuen has closed down. Yamaguchi Kumiko (Nakama Yukie) finds herself a teacher of a few young kids who don't really benefit much from her style of teaching. Through some twist of fate, she is offered a job as a teacher in Kurogin Gakuen.
She becomes the teacher of a delinquent 3D class which make her previous students look like angels. In order to protect her job, she must again hide her true identity - the fact that she is the 4th generation of the Oedo Family, a prominent yakuza group.