Miwako and Shiro live only with their mother and two sons. Miwako was not dissatisfied with living with her son, but after divorcing her husband, the male relationship tended to be cut off. At that time, my son around the age witnesses the place where the boss of the part-time job is raised to the house and attacked and the body is sought. Shiro, who saw the shocking scene of his mother, confessed, "I want to be my mother too ...". Miwako, who couldn't refuse her son's request and decided to give sex education to her real son, repeats the body that she feels and the heart and conflict that endures it.