Can't remember..

Hey Minna~! I'm looking for a not so known yaoi where there's a dirty criminal seme and the "special" agent (with a hidden identity, nickname etc) uke. The agent got caught by his target, tied down and we discover he is a M. Stuff happened but they don't admit they fancy each other. At some point they have to work together and sleep on the same bed. Also, the tongue of the uke moves REALLY WEIRD when they "do it". Please, does anyone know??