Consenting Adultery (2006)

Hayami Kouta is the superintendent at an apartment building, where two busty and very horny housewives reside. Whenever the ladies are feeling particularly unsatisfied with their husbands, they call upon Kouta for some personalized handywork. Thinking he's making mere service calls, Kouta innocently arrives at the ladies' apartments. But it doesn't take long for Kouta to catch on that it's the ladies that require the maintenance. Fortunately for Kouta, he's got the right tools for the job.