A Beginner with the Mightiest Account

As a sudden crisis occurred, the Earth entered the OL Era. Humans became playthings of an unknown enemy. Everyone got a level-1 account. In an era dominated by the strong, Ye Hao, a high school student, could only upgrade to level 3. When he was about to die, he accidentally activated the Max-level Account System. Will he become the strongest person in the world?