From Shoujo Crusade:
Ichino is a high school girl who absolutely hate guys due to the fact that her father betrayed them when she was young; stealing all the valuables that she & her mother possessed & disappearing without a trace. Since then she has vowed to become strong so she would not lose to any man. She has also longed for the day she could meet the lady from a fateful encounter in her childhood. One day, she accidentally beat up a guy who she mistook as a pervert pestering her friend, Miyabi. She tries to apologize but ends up beating him up even more.... She developed a distaste for the guy and two of his friends as they bump into each other once again resulting in more misunderstandings. Ichino personally believed that if she came across the same person thrice that would be considered 'fate'... Coincidentally, the start of her school begun with a surprise as she found out that all THREE of them turned out to be her new classmates !!

A dad that's a professional model passed on his stunning male looks to his only child, Kiri...but unfortunately, that Kiri is a girl! So Kiri ends up becoming a male model herself somehow. Tohya Enishi is the love of her life, and enters the world of male modeling in order to protect him. But things get really complicated when others start to fall for Kiri and her male alter ego! (Source: Tokyopop)

Open seasame : On a rainy night, Takuma picked up a young girl who was soaking wet. But as it turned out, Ruka was a boy who ran away from home, and he decided to stay at Takuma’s apartment. But what’s his real identity ?

Siffle Brown is an exchange student who suddenly appeared in front of Hina. He seems very arrogant and forceful, but he's also very handsome and (probably) kind. And he turns out to be a real prince?!
(Source: Aerandria Scans)

The heroine, Tokieda Nao, discovers that she has an unexpected fiancé! It seems her father's company is having difficulty, so in order to save it, he arranged a marriage between Nao and the son of a wealthy man. Unsurprisingly, Nao isn't exactly happy to hear this news. To make things even more 'fun', Nao is attending a new high school. Up to this point, she had only attended all-girl schools. Her new school was an all-boys school until this year, so it is about 95% guys!

Nao knows that her new fiance is a student there, but she hasn't been told exactly WHO it is! Right away Nao meets two interesting guys at school. They are the somewhat surly Sakaki Mitsuru, and the very pretty boy Toono Minori. Nao believed Minori was a girl at first, and was surprised to realize he's a boy.

Nao searches for the boy at the school that is her fiance, but she doesn't know much about him, only 5 clues: 1.) One of his initials is "M" 2.) He has a mole somewhere near his hip 3.) He has a flower-shaped birthmark 4.) She met him when she was a child 5.) He has a fear of high places.

The hunt is on as Nao cheerfully searches for her new fiance. More than one boy seems to fit her clues, how will she ever figure out who it is?