Maiko lost her husband at an early age and raised her young son Kosuke on her own. However, as her son began to resemble her beloved husband, her body began to writhe with secret desires and continued to release them alone. Kosuke also loved his mother more than a family member, and they spent their time hiding their feelings from each other. Then, on the night before Kosuke's wedding, she lovingly stroked his cock, saying, "Just tonight, the first and last time..." However, the lust that they had kept secret for years drove them both to even greater pleasure...