The latest installment of the "Documentary: Close-Relation Incest" series is here! This time, the forbidden relationship between stepbrother and stepsister deepens, heading into uncharted territory. After their parents' remarriage, the stepbrother and stepsister met, but initially had almost no chance to interact. However, the sister felt a powerful attraction toward her stepbrother and struggled to conceal her feelings. As a college student beginning her job hunt, she started visiting her stepbrother's place every time she came to Tokyo, gradually drawing closer. The stepbrother, too, found himself captivated by her charm, and their bond slowly approached a dangerous line. How this forbidden romance will unfold is now the center of attention!