I remember the Seme sending the Uke gay materials on purpose to fluster him, but the uke doesn't know it's from the seme till later on. The seme has black hair and kinda broady and hairy. I think he's a writer but im not sure. I remember the seme "punishing" the uke for opening the materials. Basically the seme caught the uke watching it.

Is it Karamete de Kudoite?