Kyuuso wa Cheese no Yume wo Miru

When Kyoichi Otomo's wife begins to suspect her husband of infidelity, she engages a private investigator, Imagase, to look into his activities. However, Imagase is not just any detective; he knew Kyoichi from their college days and has harbored feelings for him for years. Imagase presents Kyoichi with an ultimatum: if Kyoichi wishes to keep his secret safe, he must offer something in return to Imagase. Initially, Imagase's request is for a kiss, but as the two men grow more involved in each other's lives, it becomes evident that they may desire more from each other than what can be easily given. (Source: Seven Seas Entertainment)