Global catastrophe, the Crimson Epidemic sweeps the world!
Zombies are rampant, order has collapsed, and mankind has returned to the bloody wasteland era overnight.
While everyone was desperately struggling to survive, Zhou Yang, a socially fearful otaku, locked the door and breathed a long sigh of relief.
Just before the end of the world, his obsession with "wanting an absolutely safe space" accidentally activated the god-level shelter system!
Outside is a bloody hunting ground for living people and zombies, while inside is Zhou Yang's absolute domain.
