well in everything it all depends on you but like the manga their will be a warning that tells you when you can rank up. Because im nice ill tell you the title of what you will turn into if you rank up at that moment. So completely your choice to rank up or wait. If you present a good case I might decide to let you redo but that will be a rare occurrence and will only take you to your previous rank not starting from scratch. To start from scratch you would need to die. [@Rune_Alchemist]