Kana Yua, a wife who ends up living at her father-in-law's house because her husband is away on his own, ends up having an affair with a co-worker at her part-time job due to loneliness without her husband and unsatisfied sexual desire... son to wife - His father-in-law, who had been asked to keep an eye on his son's daughter-in-law, learned of her infidelity and began to engage in sexual acts with her son's wife.