Ok I was reading this bl and so far it was about a dude who went to the bathroom and heard...

Ok I was reading this bl and so far it was about a dude who went to the bathroom and heard a guy jacking off and that same guy went on the same train as him and he took a hike up a mountain and stayed with older lady who had a medical issues and thought the guy that was staying with her grandson and I also think somebody was homeless? I’m sorry I don’t remember much of it but if somebody knows the name help me find it