The Cornered Mouse Dreams of Cheese (manga)

The Cornered Mouse Dreams of Cheese (窮鼠はチーズの夢を見る, Kyuuso wa Cheese no Yume wo Miru) is a drama, yaoi and josei manga by Setona Mizushiro. It has a sequel, The Carp on the Chopping Block Jumps Twice and a live action adaptation.

Synopsis
"Kyouichi’s indecisive character has led him to repeatedly commit the foolish mistake of adultery. One day, Imagase, a college classmate he hasn’t seen since graduation, shows up as the private detective hired by his wife to investigate his infidelity. Imagase, however, proposes a deal. He won’t tell Kyouichi’s wife about his affairs, but, for compensation, he makes an unbelievable demand: “I want your body in exchange…”

Volume 1

 * Chapter 1
 * Chapter 2
 * Chapter 3
 * Chapter 4
 * Chapter 5
 * Chapter 6