After his company went bankrupt, son-in-law Koji became unemployed. As a result, he and his wife moved in with her mother, Eri. While desperately searching for a new job, Koji struggles to find work, and tension and discomfort grow within the household. Seeing his depression, Eri tries to comfort him by soothing his wounded confidence and body. Eventually, with Eri's help, Koji lands a job—but when he discovers it came at the cost of her body, his feelings toward her begin to change.