I, the undead, save the world with the dolls

Because he failed in challenging the Phantom Twin Rings and lost his save data, Sun Yang burped in anger.
I woke up in the world of Dark Souls 2?!
Fortunately, I can still get in touch with the dolls from "Girls Frontline" and "Cloud Atlas", so I don't have to struggle in this terrible world.
This is a story about an old player with some ambitions, who accidentally becomes an undead and travels around the world with a group of humanoids to fulfill his own little selfish wishes.
PS. I think it is an infinite flow, and I will go to other worlds for activities. So far I have been to: The Last of Us, Call of Duty: Advanced Warfare, Fallout New Vegas, Fallout 4, Alien WWII, XCOM2, 2077.