Aki-sora manga

It is the year 2100A.D. and humans have invented a virtual reality game called "Second Life". Feng Lan, due to a bet with her brother, vows to beat him in the game. Thus, she becomes the first transgendered character in "Second Life", in other words, she is the only person who is the opposite gender in the game from her real life. As her popularity rises because of her looks, skills and team mates, can she keep her identity a secret from her loved ones and friends to prevent trouble?
Note: This manga is actually Chinese, so most names are different compared to the names you normally see in other Japanese manga. 

From birth, Cesare Borgia is surrounded by hellish shadows that threaten to consume him. Damned by his own father, hated by his closest brother, separated from the sister who loves him, and driven by the demons of Hell itself, he sets out on a quest for p

"On that day, I became the enemy's possesion," Nakaba thought as she stood there, knowing her destiny was to be married for convenience to keep the peace between her country Senan and Prince Caesar's country, Belquat.
Between the two countries there has been a constant war for 200 years and Nakaba has become a sacrificial goat for her country despite the discrimination to her red hair and to the 'sub-person' (half-human, half-animal) Loki, who is her only friend and attendant at Caesar's estranged palace.
But what will Nakaba do when she foresees an event pertaining to Prince Caesar's demise? Will she save him? Or let him die in return to all the hate directed towards her by the people of Belquat?

Hiromi can't wait for her cousin Makoto to come live with her - but when "he" finally shows up, she gets a good deal more than she bargained for. Toshiki Yui turns a hentai fetish into the plot hook of this high school situation comedy.

A young boy is saved by a mysterious gunfighter who uses magical bullets. She is the greatest magician in the world but disappears shortly after saving him. Having fallen in love with her, he trains to become a gun fighter and ten years later, his search comes to an end but his adventure has just begun.

From VIZ:
Kurohime is a buxom witch with the power to control magical guns. She once made the mistake of challenging the gods and was cursed for her foolishness! Transformed into a little girl named Himeko, she can only regain her former body and powers when she falls in love. But finding love in a world fraught with evil is no easy task.

IMPORTANT!! Read chapters with a #2 near them after Volume 2 Chapter 5

A new teacher enters an all-girls high school and as he tours around he sees a female student sleeping in a classroom. When she wakes up, however, she suddenly kisses him... 

From Aerandria Scans:
Men - they're the root of Takanashi Chiwa's problems, which is why she never had the time nor the opportunity to have a boyfriend in her entire life. A full-time office lady and a part-time hostess, she works night and day to pay off her dad's debt from his failed business. One night at her part-time job, a high-class customer has her fired. Then the next day, she's called in to see the president - whom she had never even seen before in the office - only to find out she's to marry him! But what kind of guy is Mamiya Hokuto anyway? Will he become one of Chiwa's problems, or will he save her from them? And will this marriage even last?!

My super strong classmate, Ran, is my cute lover. We are so in love! Or that

Fourteen-year-old Kouichi Hayase�s life has always been a mediocre one, if not dismal. However, those days of being bullied by classmates and escaping to a fantasy of being a hero are put to an end when a certain �accident� bestows on him a girl and a gigantic humanoid robot called �LINEBARREL�. The extraordinary power that Kouichi obtains puts him and everything around him on a sudden rollercoaster ride of battles, intrigues and friendship! During the course of his adventure, the boy starts to learn what life has to offer; he meets new friends, bids farewell to the old ones, but most of all he now has considerable responsibilities and is forced to confront the world around him.

Tsuchie Takeshi has dreams of playing with Hikari-chan as a child. He remembers her as a kind, sweet girl. However, one day on the way home from school, Takeshi is abducted and taken to a huge house, only to find out that she's become an arrogant, violent dominatrix. Furthermore, she says that he promised to marry her! How will he adjust to her new personality, and living with her as a new son of her prestigious family?