Qingcheng lives up to its name, but with no choice but to cover it up with layers of veils.
She had helped him unintentionally when he was young, and he always remembered it.
After they grew up, they met again accidentally, and at that time, their identities had changed greatly... At first, he regarded her as his sister and doted on her infinitely. Then he found that he was slowly attracted to this sister, and he only wanted to hide her and take good care of her... And she, in the process of getting along with him, slowly lifted her veil...