This is a future ruled by Monster Girls ー in fact, both your mom and your sis are Lamias. It's always been this way as far as you're concerned. Your parents are away for the weekend. As you and your sis are having breakfast together, Daphne suddenly stretches her tail towards your cereal bowl, grabs it right out of your hands and starts munching it. She grins at you, a hint of mischief in her eyes. "Omnomnomnom~"

It's always been this way, but you still can't get used to it...