Kiyo is married to Mitsuhiro, who pays monthly child-support for his three-year-old child living together with his mom. Although their relationship is fine, Kiyo feels the presence of Mitsuhiro's ex-wife, Reina, and their child, Shou, at every turn. One day, Kiyo's colleague Matsuda levels with her, saying she's practically living in a polygamous situation where time and money is being spent on Mitsuhiro's ex-wife and child. Shortly after this, Kiyo has dinner with Mizuki, a man with which she had a failed romance, and his wife Haruna. ......?
