Loving someone is like making a bet with time. They met at the beginning of the year when he was nine years old, and when he was twenty-two years old, he finally confessed to her as a man. It took him more than 4,700 days and nights to finally gather up the courage to tell her how deep his love was. In the past thirteen years, the world has been changing rapidly, stories have been changing, Hui Qingcheng has begun again and again, many people have left and come in a hurry, she once loved others, and he always loved her. In thirteen years, they grew up from children who were ignorant of the world to adults who love each other, crossing the age gap and crossing the worldly river. If we must trace the beginning of Oupai's relationship, perhaps it was the rainy night thirteen years ago when he was picked up from a broken family. When he picked it up and walked into her house, that night he originally thought it would be the darkest, coldest and most desperate moment in his life. However, the moment he opened the door and met her, his world suddenly became clear and there was no more night. Time and his heart stayed at that moment forever.