System maintenance

When he woke up, he changed from a university teacher to a person selected by the "magic" system, and inexplicably got into debts. "Ding, the system is under maintenance." This sentence is the only pillar that accompanies him to live different lives in different roles. He waits for the damn system to be maintained and send him back.Content tags: strong through time and space┃ Search keywords: protagonist: Silence┃ Supporting role: a big wave