C478 I'm Back

In the courtyard that stored the World's Gate, Sajou Manaka was sitting in a chair in a place where few people existed. In front of her was a big and thick book that could almost be used as a table on the ground.

"Pah!"

Closing the huge book in front of her, Sajou Manaka looked at the World's Gate in front of her thoughtfully.

"If I want to talk about the application of space and time