After her mother-in-law passed away, Mizuki started living with her father-in-law. Unlike her workaholic husband, Mitsuki began to Kokoro to her father-in-law, who was always considerate of her. But... Behind her father-in-law's kindness was a wicked desire. He was plotting to get his hands on Mizuki's beautiful and attractive body. Unaware of this, Mizuki was exposed to her defenseless state, and her father-in-law's poisonous fangs were about to attack her...