Muto-san is married to a man who runs a company, blessed with children, and seems to be living a life that everyone envies. In fact, she suffers from postpartum depression, and with endless worries, she feels depressed and can't sleep for days. In the midst of all this, she consults with her mommy friends, and finds out that they all have the same problems, and one of them tells her a radical way to relieve postpartum depression. It's to look for a man who sees you as a woman on an adultery website and enjoy an affair...