91 Mutation, Who Said Self-Study Cannot Become an Immortal?

"The thing is like this, I was just staying in Xiuxian Middle School and being a loser, but the [91] APP on my phone suddenly mutated." "It has to say that I can cultivate immortality, practice martial arts, learn magic, and play with supernatural powers..." "From then on, the world opened up in front of me." "Is this the reason why you neglected your high school classes and insisted on using magic to sweep people away and use your invisibility to walk through walls and hunt for treasure?" "I, Shen Shu, never follow the rules. I don't want to break the school's rules. I went to 91 University!"