The wife's friend fills in for the wife on lonely nights!  Hyun-joo quits her job and gets kicked out of the house she can't pay for. In the end, she stays at Hye-jin's while she looks for a job.

An Affair: My Wife's Friend

Jong-min, a tutor, keeps attracting attention from the student's mother rather than a student who doesn't have much thought to study. Dong-hee, a young mother, still notices Jong-min's eyes. The two who couldn't control the body that gradually warmed up in their grazing eyes began to enjoy the burning affection while the students went errands...