Due to an accident, Xia Xining lost her parents when she was young. From then on, she was fostered in the home of her father's old friend Han Luodong, and met a brother who protected her at all times - Han Dongxi. She was used to Brother Dongxi's "risking his life to save" when someone bullied her. At the age when a young boy is just beginning to grow up and his love interest is beginning to blossom, Xia Xining can fill the whole desk with the love letters she receives for her brother in one semester. "Brother Dong Xi, do you know what it feels like to like someone?" She asked this question after reading all the love letters that day. Han Dongxi just looked at her and smiled playfully without answering.
Later, she stopped reading letters to him because she understood that her eyes were full of him and could not tolerate anyone else.
Concept: Fake siblings, mystery of life experience, childhood sweethearts, sadomasochism