Quiet Life Crisis

On a whim, older salaryman Chihiro is swept up by Taiji, a massage parlor manager in his 20s offering happy ending massages. But after leaving his wallet at the parlor, Chihiro ends up with Taiji as a housemate! What's more, Taiji begins helping Chihiro with prostate massages as a form of payment. What fate awaits these two?