[darksassin]

Sorry for posting rhe same thing....
But, if you want proof...

Spoiler for nothing exactly:

Standing there was the figure of the last person to come visit me, Nagato Yuki.
As usual, Nagato said without any emotion,
"I am responsible for everything that has happened."
For some reason, I felt nostalgic at hearing this calm voice.
"My punishment is currently being assessed."
I lifted my head and asked,
"Assessed by whom?"
"The Integrated Data Sentient Entity."
Nagato said calmly, as though it had all happened to someone else instead.
Of course, Nagato had long known she would create a ruckus on the morning of December 18th.
Because I had gone to visit Nagato three years ago with the adult Asahina-san. She knew all
along, and she tried her best to prevent it from happening. Yet there was no way to stop the tide.
Sometimes even if you knew what was about to happen, you just couldn't avoid it. No, it was
possible to avert it...
I suddenly thought of the behavior and mannerisms of Nagato after summer, which were slightly
different from before,
"But," I interrupted her, "If you knew you were going to go astray three years ago, you could've
told me any time, couldn't you? Whether it was after the school festival, or before the baseball
tournament. In that case, I would've been able to take action earlier in that specific time on
December 18th. Then all that would've needed to be done would be to call everyone out and
travel back to three years ago again,"
Nagato's expression was as cold as ice, there was hardly a smile,
"If I had told you beforehand, my astray self would still have been able to erase all your
memories concerning the incident and change the world. Besides, no one can guarantee that
something that hasn't happened will ever occur. The best I could do was to keep you in your
original state when December 18th arrived."