I'm looking for this manga... It's about step brothers, the seme is an author and the uke ...

I'm looking for this manga... It's about step brothers, the seme is an author and the uke is a high school student, they got really along, I don't remember what happened but I think the uke discovered that his brother is gay and moved into a dormitory ( and the author of this manga also wrote a story for the roommate, who fell for his teacher)
I'm sorry for my english, I don't know if I explained it well ╥﹏╥