Eun-jiandSeung-ho,Seong-sikandJoo-ranmoveintoaneighborhoodatsimilartimes.Eun-jiislonelybecauseofherhusband'sfrequentlate-nightsandSeong-siktakescareofthehousewhilehiswifeworks.Oneday,Seong-sikgoesovertoEun-ji'shousetoreturnapackagebutendupdrinkingwinewithher.Seong-sikdrunkenlykissesEun-jiandthetwospendanightineachothers'arms.Theycontinuetomeetsecretlylikethatandonedaylietotheirhusbandandwifeandleaveonatriptogether.However,Seong-sikreturnshomebecausehispipeshaveburstandEun-jiwitnessesherhusbandandthewomannextdoor,Joo-raninbedtogether.Afewmonthslater,Seong-sik,Eun-ji,Seung-hoandJoo-ranrunintoeachotherbutwithdifferentpartners...Areyoulivingwiththeoneyoulove?
