Time Paradox Ghostwriter, Volume 1: Jump Through Weekly Time! (Time Paradox Ghostwriter #1-7)

Teppei Sasaki is a rookie mangaka trying to get a series in Weekly Shonen Jump. When it doesn't work out, he's cast into the depths of despair... until suddenly, an issue of Jump from ten years in the future appears in his apartment! It's a time-travel spectacle balancing Shonen Jump and the fate of Teppei's future!!