 If you liked
Gokusen
|
 ...then you might like
Ansatsu Kyoushitsu
|
Both manga have a teacher main character in charge of delinquent students that other teachers have given up on. The start of Gokusen is a little bit episodic where it would deal with reforming a student and the student finally accepting the teacher. Both have elements of comedy but Gokusen does have romance. It's not very in your face though and it only starts actually happening at the very end.