Want to see an introduction similar to "Game of Death: I Can See Items!" (Don't ask, please open your eyes)" book. The real world is not a game, there are thousands of people in the alien world, dungeon management, no rules and weird talk!
The protagonist, who is extremely sociophobic in reality, travels through time and space into strange stories about horror rules. The atmosphere of the dungeon is depressing and scary, and the residents are weird and dangerous. No need for complicated social interactions, just rely on careful insight into details and loopholes, understand the weird underlying logic, and survive in a low profile
