I forgot the manga :((((

I forgot the yaoi manga where there was two friends, one's a manga artist and one has a manga artist he adored. The manga artist asked his friend to get tied up as an inspiration for his bondage manga, the friend declined but he said he will get the signature of his favorite manga artist so he accepted then the friend gets tied up, he gets horny, they have sex and so on but in the end he learned that his friend was the manga artist he adored and was shocked, he even bought the manga. I forgot what the title is, please help.