Goodbye, Campus Belle Girlfriend

(The protagonist starts out as a good-for-nothing + comeback + she regrets dumping him)

Zhang Bai and Zhang Xue depended on each other from childhood. Zhang Bai did poorly in school and dropped out of middle school early to work. By chance, he met Liu Jiangrou, and they became a couple...

Three years later, he was cruelly dumped. Facing a double blow to his love life and career, Zhang Bai began his road to a comeback.