I'm really not a top magician

[Note: The first two volumes are original stories. If you want to watch the Holy Grail War directly, you can jump directly to the third volume]
The Root Princess Aika Sajo inexplicably traveled to the Type-Moon world, but it seems that there is something wrong with this world line.
Then she...
I became the first genius of the Clock Tower without knowing why.
Unwittingly became the youngest Grand Master Magician in history.
I won the Holy Grail War by accident.
Saved humanity in a confused way.
……
However, Aika Sajo knew very well that although she was a time traveler, she did not obtain a system and did not have any golden fingers.
The only thing she had was luck.
"Let me be frank. I'm really not a Grand Master Magician. I'm a wimp. Why don't you believe me?"
Standing in front of the fallen Goetia, Aika Sajo said helplessly to everyone.