So...i've been looking for this manga for a while that I really forgot. It's the story is about a middle age men or something like that, he is an erotic novelist, oneday he he come to a cafe and fell in love for the first sight with a young lady that happen to be a waitress there...

The men characteristic : he is a tall men using glasses

The women characteristic : slender young women with long black hair.

I do believe that the genre has to be a mature/adult josei.

Please help me, i'm so desperate 😭 really want to read it again

It sounds like Kannou Sensei?