This book is a comprehensive comic book. The author is too lazy and doesn't want to think about the introduction anymore. I really don't know how to write the introduction below...
In the first world, the Fourth Holy Grail War is ongoing, and in the second world, the choice is between Date A Live and the Promising Princess... I guess...
This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.
