Meguri's husband had to go on a business trip away from home, so she had not been sexually satisfied for a long time. One day her sister sends Katsuya, her nephew, to her house to ask her to take care of her while her sister travels. Because of the lack of sex, Meguri defiantly seduced her nephew, who is still her new son. She teaches Katsuya how to wear a condom and instructs Katsuya to have sex. But wearing a sack made him unsatisfied. Katsuya decided to insert her bare penis straight into Meguri's vagina and squirt all her semen into her over and over again...