Milf "Ai Komori" in her lesbian debut. Wife "Ai" continues her career after marriage, while her husband is frequently away on business trips. The time they spend together keeps shrinking, and Ai grows emotionally distant from her husband. One day during her commute, riding in the women-only car, she senses an unpleasant presence behind her. At first, she thinks it's just her imagination—until suddenly she feels fingertips touching her buttocks. She nervously looks back, but no one is there. At that moment, she doesn't yet realize the two women who are about to turn her life upside down have already set their sights on her.