I'm looking for manga in which a male protagonist is surrounded by women.

It can be:
1.) A male student attending an all girls school/school that is newly co-ed.
1.a) A male teacher teaching at an all girls school.
2.) A Boy who lives with/comes to live with a number of girls, in a dorm or house.
3.) A boy who finds himself in a place where the majority of the population consists of women.

________________
Feed your head.

1) Otome wa Boku ni Koishiteru (gender bender)
2) Love Hina
2) Hayate no Gotoku

Additional:
Highschool of the Dead

1a) Negima
2) Umi no Misaki, Ai yori Aoshi
3) Nagasarete Airantou

1) Infinite Stratos
3) Girls Bravo IIRC

Sekirei

________________
"Thus is our treaty written, thus is agreement made
Thought is the arrow of time, memory never fades
What was asked is given, the price is paid"

seitokai yakuindomo

yomeiro-choice

omamori himari

Shina Dark

Ah, you read it.

I've read a few of these, but none come to mind right now : /

Male teacher / all-girls school - Yasashii Sekai no Tsukurikata

Scenario (2) - Nozoki Ana

Only the ultimate one Ai Kora

http://www.mangaupdates.com/series.html?category=Love+Polygon& orderby=rating
http://www.mangafox.com/search/genres/Harem/

are the automated lists.

Currently Asu no Yoichi has been getting alot of chapters translated... about a guy raised in the woods to be a strong samurai, father decides he's too strong, and sends him off to a dojo in the City, that owes him a favor, the parents are gone, place is mostly run by the 4 daughters.

Amaenaideyo!!

Male is the reincarnation of Budha. Lives with a bunch of novice nuns, defeats ghosts, usually by 'awakening' (pun with cumming') when the girls get naked.

Isekai no Seikishi Monogatari

One of those side stories to Tenchi Muyo, the world has pilots of armors, which are mostly women due to most men can't. men who can aren't impossible, just rare so they are generally used as stud material.

haven't read the manga.

Not sure how you could get Gou-Dere Bishoujo Nagihara Sora on your list without first reading Sora No Otoshimono, which was the work he got animated.

Your list also doesn't have To Love Ru/Darkness. Shounen Jump started harem... went on for a while artist got pretty good.

1) The World God Only Knows. It's about a galge nerd who has to save girls from possessing spirits with love

Sense (it's borderline-H if that is ok to you..)