As Yume Hime asked, here a small summary of this lovely shounen ai anime. (there is the manga too, but I haven't read it)
I'm not very good with summary, but I will try!
The story revolves around 3 pairing.
Junjou Romantica (that also means the 'name' of the first couple)
Misaki and Usami is the main one.
Misaki is a young student that for some reasons goes living with Usami (a brother's friend), who is a novelist and also a Boys Love writer! XD
Usami loves teddy bear, his house is full of them! XD
Junjou Egoist
The characters of this couple are Hiroki and Nowaki.
Hiroki is a Usami's old friend, he is a teacher in the university where Misaki studied, and Nowaki is trying to became a pediatrician. They also will start living together.
Junjou Terrorist
Miyagi and Takatsuki.
Miyagi is a co-worker of Hiroki, and Takatsuki is a young student and also the brother of his ex-wife. Plus he is the son of the university's president where Miyagi works!
As you can notice all the characters are bound in some ways!
I really like this series! Finally a shounen ai well done!!!
Watch it!!!!