When they first met him, she was 21 years old and he was 18 years old. One is from a municipality in the south, and the other is from a third-tier city in the north (the emphasis here is not on the so-called regional class issue, but on the convenience of understanding differences in habits later). Because of online dating, he fell in love with her, and she also fell in love with him like crazy. They love each other deeply, but they hurt each other, they laugh at each other's happiness, and they torture each other... In the end, it's time that wastes time on love, or love that wastes time... After a moment of ups and downs, a lifetime of smiles and prosperity comes!