Kogawa Iori, a married woman, was exhausted from her husband's erectile dysfunction and relentless pressure from her mother-in-law. With lustrous black hair and a captivating appearance, she found herself mentally and physically drained by the stresses of daily life. Into her world steps Kudo, a man living in the same apartment building. Kudo had unique sexual preferences, particularly a strong attraction to beautiful black hair. Meeting him sparked a new desire within Iori, and through his training, she gradually awakened to her own sexuality. This is a story where the struggles and desires of a married woman collide, culminating in what stands as Kogawa Iori's finest dramatic work.