It's not fair to compare an anime with a book, but this having the concept of time travel, I came to realize how weak this story is compared to Steins;Gate
which I just finished watching. This book centers more on the emotions and relationships of the characters rather than the act of time-traveling itself. Traveling through time was only shown
once, the rest of the coming back and forth were only told
, not even enough flashback experiences about it. As for Steins;Gate, it was indeed a time-traveling adventure story with plenty of emotional and funny scenarios.
Thus, I'm gonna dock 1 star.