At the nursery school his son attends, there is a regular get-together called 'Daddy-Mommy Night' for parents to socialize. Karen-chan's mom, who recently enrolled her child, attended for the first time to greet everyone. Although she is a single mother, the dads can't help but notice Karen-chan's mom, who looks like a model and is nothing like their old wives. That night, after sending the old wives home, the dad friends stayed with Karen-chan's mom…
