Ten Years of Loving You

At 17, Wen Heng who was an adopted child, was finally found by her biological parents and brought back to the family home in Beijing. There, she tries to adjust to her new life with her new family but problems occur when her adopted sister felt threatened by her presence and started throwing tantrums. In an effort to keep the peace in the family, Wen Heng was asked to move into a family friend's house next door. There, Wen Heng meets Yan Xi and the two of them slowly start to grow closer as they live together and go to school together. But this happy life didn't last long when Yan Xi has to return to America to be with his sick mother.

Love will tear us apart and ten years of loving has a little connection when yan xi left wen heng to go to america and when he came back everything has changed.

Both:
- leads get to know each other in high school
- one of them leaves without a word (FL - The First Frost, ML - Ten Years of Loving You)
- FL has trouble / drama with her family
- ML is a green flag, dedicated to protect and care for the FL
- they meet again years later (TFF - 8 years later (if i remember correctly), TYOLY - 7 years later)
- living together

I found the two FL's family situation quite similar, though it takes up more of the story in Autumn Fairy Tale. The topic of the last 20-ish minutes is also similar, but it would contain spoilers, so I'll just leave it at that.