Fate is a complimentary word for Xiao Xiao. Of course, she doesn't know if such a word can be used in this situation: she reunites with her tutor after many years of absence, but her identity is the sister who is the "perpetrator".
The Xiao Xiao in front of Xu Jiashu can still overlap with the image of the skinny little girl who was terrible at math many years ago. But when she respectfully shouted "Mr. Xu" for the first time, he knew that time would eventually change people and things.
All coincidences happen naturally, allowing the lonely two people to continuously get closer in memories and reality, and open up each other's hearts.
But when the not-so-candid truth is slowly revealed, where should the two souls clinging to each other for warmth go?