[Crossover] O Uchiha Girl

Transmigrating into the cheat-code clan of the Uchiha is very fortunate for anyone who transmigrates into Naruto. The only catch is that you must not be from the same era as Itachi!

A story about an Uchiha girl who gradually grows stronger with the help of a System, so she won't be killed during the night of the clan massacre.

P.S. The protagonist has a space-time physique and will often end up in other worlds.

Theme: If you want to survive, you have to work hard