Sorry i use google translation
I want to play another nameless scene, I only have to delete the game and reload it?
If I really had to play again, I would feel very sad.
I haven't finished the game but I saw the answer disappear.
Nameless event is one-time-only event, you cannot undone what you choose even you start to play again. But if you have keep your old "persistent file" before you choose a nameless's choice, you can undone what you choose.