Kanna, a former president's secretary, got married to a man who runs a business. As her mother, although she is her stepmother, she cares for her son who is withdrawn from her home even when she is an adult. Her mother-in-law gave her a massage to encourage her son one day. However, while her mother-in-law is puzzled by the unexpectedly splendid lump that swells big and hard while she rubs it, she unconsciously wets it gently. She was pestered by her son who was so excited that she wanted him to take care of her...!
