Wu Bai's DT fanfic, with the original heroine Lin Feier.
The first time she saw him, she fell in love with him at first sight, and she knew he was hers!
When he met her for the first time, he thought she was a cute girl. As he got to know her more and more, he realized that she was like a cookie, and he, who had always been calm and aloof, became increasingly obsessed with her!