This story tells Pei Yang's story from her older brother's point of view.
Before she turned thirteen, Pei Yang was the most lawless little devil in the world.
Raised in the palm of her brother Pei Zhinan's hand, she always got whatever she wanted and accomplished whatever she set out to do.
So the day she met Lu Xubai, she rose onto her tiptoes, kissed him, and declared with perfect confidence, "I've kissed you, so now you're mine."
Lu Xubai was as cold as a block of ice, yet she left tooth marks all over his face, and his ears stayed red no matter how long he waited.
Later, their memories were erased twice, and they forgot each other twice.
The first time they forgot, someone else made the choice for them.
The second time, they chose it themselves.
But no matter who made the choice, the result was the same: they lost each other.
Amid the vast crowds, on bustling streets, at every intersection where they might have met, they passed one another without either of them looking back.
All they could do was forget each other again and again, then remember each other again and again.