Erina Shirato, 38 years old, lives in a high-rise apartment along the river with her husband and son who are 12 years older than her. Her husband is a tax accountant and she got acquainted with Erina when she was her secretary. She lives without any inconvenience, but her husband is busy with work and has been sexless for 3 years. Her child also passed the entrance exam to a private school without any problems, and now she doesn't have to worry about it. She suddenly has free time and feels lonely when she is alone. At that time, it seems that her obscene delusions swelled. But I never thought it would come true today.
