Do you have any regrets that cannot be made up?

Shinobu Kocho: "My sister died in front of me, that is my lifelong regret."

Rin Tohsaka: "If I can, I am willing to give everything to change Sakura's fate."

Kurumi Tokisaki: "If I could go back to the past, how great it would be if I had not become an elf."

Kirino Kosaka: "Well, I just want to go back to the time before I was discovered playing porn."

Bai Yi: "Pay money, get in the car!"

I am the ultimate life form Tartarus.

I will take you through time and space to change the regrets of the past.