Manga that has married schoolgirls as characters

Quite a lot of manga have schoolgirls falling in love with their classmates, schoolmates, other boys (from different schools), underclassmen (kouhai), upperclassmen (senpai) or teachers (sensei).

However, there seems to be plenty of manga about married schoolgirls. Some of them are married to their teachers. Some of them are married to men who are old enough to be their fathers. The others' husbands are High schoolmates their age.

Here are the manga I know about:

Mama wa Doukyuusei:
Mama wa Doukyuusei means "Mama is a classmate" in Japanese. In the story, a high school boy is shocked to find that one of his own schoolmates is his stepmoher, who isthe same age as him and is married to his father. Both he and his new stepmother are having a hard time concealing the secret from their classmates.

Hiyoko Brand~ Oku-sama wa Joshi Kousei:
Oku-sama wa Joshi Kousei means "My Wife is a High School Girl" Onohara Asami is a cute, 17 year-old, 2nd year high school student. What nobody knows is that she's actually already married, to her 25 year old physics teacher.

Sayonara, Zetsubou-Sensei:
One of the students is Ōkusa Manami, a married high-schooler who works multiple jobs to pay off her husband's debts. Her name derives from okusama-nami (奥様な身?, "a married person"

Okusama ha Seito Kaichou:
Okusama ha Seito Kaichou means "My wife is the head of the Student Council" in Japanese. The student council president is secretly married to a high school guy.

Billion Girl:
A 16-year old high school girl voluntarily agrees to marry a wealthy older man so that her family is able to pay off their debts.

Zutto Suki Suki Daisuki
Tsugumi, age 16, is secretly married to her class teacher, Takuto. Her rivals appear one after another, and she has to struggle tiding over love crises.

Faster Than a Kiss summary
After losing their parents, 16-year old school girl Fumino and her 4-year old brother hop from one relative to another. Getting tired of all those movings, she finally decides to quit school and work to support her brother on her own. As they sat on a park bench, her 24-year old english class teacher appears in front of her and agrees to her demands of marrying and supporting both her and her brother!! Is he serious or just playing around...!?

Ichigo no Gakkou summary
Itabashi Kurumi was a regular, everyday High School student...until she got pregnant by none other than her teacher, Oomiya Ichigo-sensei. Now pregnant, Kurumi dropped out of school and Oomiya got fired from his job. Half a year later, the two get married and live with their kid. The two of them have to get through the many obstacles ahead of them, as they now face only challenges.

I already have read all of those manga above. Some of which I read are not still translated. Others I have read in english. In the raws I enjoyed looking at those pictures without bothering to decipher those Japanese kana/kanji/hiragana at all. I like the artwork in most of these manga very much.

Have you read any of these books already? So what do you think about it? Do you dislike that the teenage girls are already married while still in school.