I Used System Bugs to Deceive the World

An Yuan works three jobs to support Liu Ruyan's extravagant lifestyle, but Liu Ruyan treats An Yuan as a backup and a lapdog, hooking up with the rich second-generation Zhao Qi, and even asking An Yuan to buy for them. An Yuan is stimulated and awakens the counterattack system. Relying on the counterattack system, An Yuan not only becomes the disciple of Xuan Yi Zhenren of Shushan, but also helps Xue Jingchu save Grandpa Xue. After that, An Yuan makes rapid progress all the way and reaches the peak of life.