My Reality Became a Zombie Game World, but Only I Can Use the Game System

“Congratulations on clearing the game. You have been chosen as a player.” Karamine Ritsu, a bullied boy at school. One day, after clearing the highest difficulty of the cooperative zombie FPS game “Dead Land 4,” a mysterious message appeared before Ritsu. According to the message, Ritsu can use the game system of “Dead Land 4” in the real world. At the same time, zombies began to appear all over the world, and the situation escalated into an infection outbreak. In a world overrun by zombies, Ritsu survives by making full use of the game system. However, to master the system of “Dead Land 4,” an erot*c game, he sometimes needs to engage in intimate acts…! A persecuted boy dominates in ...