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Loveless (2005)
Twelve-year old Aoyagi Ritsuka is left with his insane mother as his only family when his brother, Seimei, is killed suddenly. After moving to a new school, he meets Agatsuma Soubi, who claims to have known his brother. Ritsuka eventually discovers that Soubi and Seimei used to be a fighting pair, whereby Soubi was the "Fighter" and Seimei was the "Sacrifice". Now that Seimei is gone, Ritsuka has inherited Soubi, who will become his "Fighter". After learning that Seimei was killed by an organisation known as the "Seven Moons", Ritsuka decides to investigate into his brother's death, with the sometimes useless help of Soubi, along the way.
http://www.animeseason.com/loveless/Papa To Kiss In The Dark (2005)
Munakata Mira is in love with his father, famous Hollywood actor Munakata Kyousuke. Unknown to the public, both of them are father and son as well as lovers. When Mira turns 15 and enters high school, he faces trouble with his childhood friend falling in love with him. Also, the fact that Kyousuke is not his biological father only depresses him further. Then there is also the problem of Kyousuke probably marrying Mira's senior's mother, whose son seems to have an interest in Mira.
http://www.animeseason.com/papa-to-kiss-…;
Gakuen Heaven (2006)
It all started when Keita Ito received a letter sealed with the initial BL Academy. The most sophisticated all boys, on campus, Academy in the country. Now that Keita Ito is accepted in the school with an average GBA, as well as average skills in sports and writing, he doesn’t think that he belong in there. But with the help from the other students, will he be able to make it in BLA.
http://www.animeseason.com/gakuen-heaven…;
Junjou Romantica (2008)
Misaki is suddenly having some unexpected and odd problems. What started as a need for some college entrance exam tutoring has somehow led him to being romanced by a suave older man who also happens to be his big brother’s best friend. Confused by all of his brand new emotions, Misaki struggles to deal with his suddenly very odd life. And if that wasn’t enough, his suitor, Usami, has plenty of issues of his own. A man-child who decorates his room in giant teddy bears and toys, Usami is a famous novelist who also writes steamy boys’ love novels on the side. When Misaki cracks open one of these books and reads sentences like "Misaki licks every inch of Usami's hot body" ...well, let’s just say that all hell breaks loose.
http://www.animeseason.com/junjou-romant…;
Kirepapa (2008)
Chisato is a beautiful 35 year old writer (who looks like 18 really), father of Riju, a cute 15 year old boy. Chisato's hobby is to drive away all of Riju's friends because he thinks they want to corrupt his precious child. So he shows his good side to these boys while he poisons the cake he brings them with a smile. However, there is one guy, Shunsuke, who doesn't fall for the tricks. But is Shunsuke really aiming for Riju? Who is that mysterious writer Chisato loves so much? and why is Chisato convinced that Riju's friends want to take advantage of him?
http://www.animeseason.com/kirepapa/Sex Pistols (2010)
This story revolves around a high school boy who discovers that he is part of a select group of humans who did not evolve from monkeys, but various animals such as leopards and black bears.
http://www.watchanimeon.com/sex-pistol-o…;
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http://www.animeseason.com/