Looking for a Yaoi

The plot was that they were both on a train. One of them was listening to porn out loud on accident. They end up hooking up in the train station bathroom. The seme is sort of like a call boy where he goes in dates with dudes. The uke works at a company. The uke thought the seme was possibly cheating on him and avoids him by working all day and night. The last detail I can remember is that the seme would put on straight porn for the uke.