Steins;Gate. Volume 2

Okabe Rintarou — or just Okabe — is a young student who still lives in a world of childhood fantasies. But when he accidentally invents a time machine capable of sending messages to the past, his life changes completely.
During the summer holidays, a tragedy occurs, and Okabe has to go back to the past time and time again to save Mayuri, his childhood friend.
The second volume of the world-famous science fiction story.