Return to the City After Becoming Invincible

My name is Tang Xufan, a time traveler. After experiencing N difficulties, I became invincible. What system do you mean? I forgot about it when I went to Invincible, and now it ignores me. After becoming invincible, I returned to the city. The schools in this world are divided into two categories. The schools for people without talents are similar to those on the earth before time travel. There are also schools for gifted people, such as mages, warriors, priests, etc. Now I am 17 years old. After being missing for three years and becoming invincible, I came back and was forced to go to school by my parents. By the way, I have a younger sister named Tang Ya. She is a genius, but of course not as good as me. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.