twins(butlers) + master
step brothers
5-6) Kagami wa Iranai (I don't need a mirror!)
Cousins Aruto and Michiru were raised like brothers and their faces look very similar. "It's impossible to fall in love with a person that looks just like you"...right? -
read only 1st story
ch1/6/0.1/0.2/Tsuzuki hasn't seen his older brother, his only blood relative, in about ten years. Living this family-free lifestyle, he falls in with some bad acquaintances. But in these circumstances, his older brother Hajime suddenly shows up?!
stepbrothers
COUSINS
3rd oneshot: two brothers and their forbidden relationship.
step brothers
After their parents' remarriage, Ryohei who's younger brother found out Nanao who just became his brother-in-law is gay. Even if Ryohei hates homo but in order to hold Nanao back from meeting his sex-friend, he bluntly says 'I will satisfy your sex drive instead of your sex-friend' and forcefully kissed Nanao
Cousins
Unbelievably gorgeous, Ritsuto Okumura has always been able charm anyone whether he wants to or not, even to the point of obsession. Although he is the only member of the current Okumura family who possesses this arcane ability, he dresses conservatively and even obscures his appearance with glasses trying to counteract this strange allure as it only seems to bring him hardship.
Nemureru Mori (tojitsuki Hajime)