Naoko lives with her father-in-law at her husband's parents' house. Unlike her workaholic husband, her father-in-law is always by her side and treats her kindly, and before she knows it, she has grown to Kokoro so much that she is completely defenseless. However, behind her father-in-law's kindness lies an ugly wolf. He is waiting for an opportunity to get his hands on Naoko's body. Under the guise of a massage, her father-in-law touches every inch of her body. Naoko is confused by her father-in-law's sudden change, but her strength starts to relax as he caresses her in a persistent way, pressing her pressure points...