Maria Nagai seems to be less fortunate than other women because the time they are happy and receiving affection from their husbands, she is lonely, masturbating in dissatisfaction due to lack of affection even though she is married. The reason is that her husband often has to travel far from home for work, so he rarely visits her, but his love for her has not changed. However, the nature of women is that if someone cares for and pampers them frequently, they will easily gain their affection, and unfortunately, the neighbor across the street understands this. He often comes to her house pretending to be naive and caring, taking advantage of her serious lack of affection and long-term lack of a man's touch, making it easy for her to develop feelings. Now, seducing her into a sexual relationship is simple because she is eagerly waiting for the moment to satisfy her desires after many days of struggling with boredom.