Love Someone Again, Be Born as Myself Again

Hong Bo is a top student who wrote many books during college, all about the heiress Ouyang Qing.

The books record every detail of Ouyang Qing's life, especially her conversations with other people. Using data, he analyzes the situations that might make her happy or sad, then works out the best way to respond.

Hong Bo becomes the person who understands Ouyang Qing best. After calculating the ideal time to confess and the perfect words to say, he puts on her favorite Doraemon costume and tells her how he feels. Ouyang Qing has a boyfriend, but she doesn't want to lose Hong Bo. He's so outstanding, and he has helped her so much over the more than six years from high school through college. She thinks this is his ninety-ninth confession and that he'll naturally keep going. But she is wrong: it is both the ninety-ninth confession and the last.

At school, Hong Bo meets Chen Jingwen, a gentle, shy girl who has had a crush on him for a long time. The two gradually grow closer. Then a phone call from Chen Jingwen's parents plunges her into grief, leaving her like a little child, and Hong Bo stays by her side as she slowly grows up. Their feelings deepen as well.

Hong Bo hates being lied to, especially when it comes to love. Then one day, he learns the truth: Ouyang Qing has been deceiving him, and so has Chen Jingwen. In that moment...