Looking for yaoi

I’m looking for a yaoi I read one time. It’s a one shot about a young man who is struggling with his sexuality while he works at a bathhouse. He gets caught looking at (normal) porn mags by an old grandma that’s leaving and he starts closing the bathhouse but then this really hot dark skinned dude soaked in rain comes in and he gets a boner just from looking at him. Where it goes from that should be pretty obvious...