When Aotu World Meets an Outsider Like Me

The protagonist enters Aotu World and forgets everything from before. Only her instincts guide her to complete the redemption. Luckily, a System is there to keep giving her cheats and help her achieve it.

Along the way, she keeps trying to recover her memories, but the System always stops her and tells her that she absolutely must not regain them unless there's no other choice, or she might die.

(Anything unreasonable in here is just my own headcanon, since I've only watched a little of Aotu World. If something doesn't make sense, you can tell me and I'll fix it. The author is actually pretty easy to talk to. Don't think too hard while reading this story, or the characters might go out of character ≥﹏≤.)