Chiyori, the stepmother who remarried with a husband much younger than her, was worried about her son who remained a shut-in even after becoming an adult. Despite being his stepmother, she took care of him kindly as a mother would. One day, when she entered her son's room to encourage him, she discovered her panties that had gone missing from the laundry. The stepmother was at a loss seeing her son panicking and apologizing, so she gently embraced and encouraged him. However, the excited son pushed her down and was about to insert himself...!
