Uragiri no machi (2016)

Yuichi seems to simply exist in a life dominated by his successful girlfriend. Out of sheer boredom, he decides to explore online dating, where he meets an older housewife named Tomoko (Shinobu TERAJIMA) also looking to escape from her daily routine. Neither are exactly unhappy with their actual partners, but their affair still brings a bit of color back to their previously monochromatic lives.