Does anyone know this yaoi?

I read this yaoi a long time ago, so bear with me on the description, it might be muddled.
One guy works at a convenience store, and this other dark-haired guy constantly goes in because he's hot for him. Then one night, the dark-haired guy follows the store clerk into a park, and I think the clerk misunderstands him and gives him a blowjob or something. The dark-haired guy is shocked. But the clerk isn't because he has sex with guys for money or something. Even though the dark-haird guys finds out the truth about the clerk he's still in love and begins to clean up the clerk's life. Ha! I just remembered, the dark-haired guy turns out to be younger and a cop! ^_^!!