Gintama's Great Reverse Penetration

——If the end of the world comes and the only thing that can save you is your avatar, what is your survival rate? Sorry, my avatar is a member of Yinfuquan! This is the story of a zombie virus sweeping the city. The Bai family brothers and sisters summoned Gintoki Sakata to fight against their fate, prevent the end of the world, and reveal the dark truth behind the system.