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 a...