Undetectable Box

Unwilling to accept the death of his friend Shi Yan, the protagonist materializes him in his memory in the form of Bug Man, who he plays with to escape from the depressing reality. Bug Man in monitored by the Memory Management Bureau, and memory collectors Fang Tang and Bai Zhong are assigned to retrieve him.

Denji has a simple dream—to live a happy and peaceful life, spending time with a girl he likes. This is a far cry from reality, however, as Denji is forced by the yakuza into killing devils in order to pay off his crushing debts. Using his pet devil Pochita as a weapon, he is ready to do anything for a bit of cash.

In his desperate quest to return to the past, Guan Chao scours the world for the "Burning Stone" — the energy source capable of powering the Time Gun. But his search takes an unexpected turn when he accidentally falls into the Memory Bureau. To find his way back to reality, Guan Chao must join forces with memory administrators Fang Tang, Bai Zhong, and others, clearing BUG beings layer by layer through the strata of memory. Yet as battle after battle draws to a close, what awaits him is far more than corrupted data… The deepest truth buried within memory itself is beginning to stir.