I'm Standing on a Million Lives 3

We'll bring the Deokk soldiers to the pit of despair and kill them! The ever-calculating Yotsuya carries out a very non-Heroic revenge for his friends—but when the truth about the world he's sent into is revealed, it is a heavy cross to bear for the fourteen-year-old. His next quest, sending him to the island of Jiffon, will make him question the very meaning of his existence!