Iroha, who lives with her daughter and her husband, was frustrated.She said it because she had heard the sounds of the daughter and her husband's activities.It's good that the daughter and her husband are on good terms, but it was poisonous for Iroha who sleeps alone.When she woke up at night, Iroha witnessed the activities of her daughter and her husband and could not stand it and comforted herself.She spent her days falling into self-righteousness, but one day, when she witnessed her son-in-law sitting in the living room, Iroha invited her son-in-law and had a relationship.A few days later, it was reported that her daughter was pregnant.She's happy, but she ends up thinking that Iroha wants to get pregnant with her son-in-law as well.