Tikosa saga

In 2002, kyoha stayed home playing on his computer and didn’t go to school, so he played a game called Romancing SaGa 3, completing it with Sara. Later, this game was documented as Tikosa Saga. 

Tikosa Saga records kyoha playing Romancing SaGa 3 with Sara, and it’s pretty similar to the actual game, just fighting monsters to gain experience. 

But kyoha used cheat codes to modify it, equipping Sara with 結界石, so the main character didn’t die as easily