Gokusen Kanketsuhen is a collection special Gokusen chapters.

1. Gokusen (ごくせん2008); You 2008 #2
Kumiko has trouble with her new class of first years.

2-4. Gokusen Kanketsu-hen (ごくせん完結編); You 2009 #4-16
Kumiko and Shin's relationship hasn't gone very far. Shin gets kidnapped by a daughter of another yakuza group with intrusions of making him her bride-groom. Shin's father informs Kumiko that although he respects her as a teacher, he does not want her to see Shin again. Then it only gets worse when the other former Shirokin try to rescue him before Kumiko gets there.

5. Gokusen Bangai-hen: Ucchi & Shiori Kyoufu no Ippaku Ryokou!! (ごくせん番外編 うっちー＆詩織 恐怖の一泊旅行!!); You 2007 #15
Chapter focusing on Ucchi and his girlfriend.

6. Gokusen Bangai-hen: Hontou ni Attara Kowai Hanashi Gekijou (ごくせん番外編 本当にあったら怖い話劇場); Bessatsu You 2007-11-20
Assortment of short stories with a horror theme.