It's Really Not a Swallowing Upgrade.

Two thousand years after the demon clan disappeared, the aliens were once again separated from human cognition. Lin Ziyin was on the edge of death. Deep in the dusty memory, the devil was born and signed a contract with him. All plans are launched, and those strangers hiding in the dark overlook everything. They are bright and dark, They are... Greedy... "Don't you have any ideals?" "No." "Don't you have any wishes?" "No." "Then what are you doing here?" "Wait until my parents come back and then have a meal together..." When Lin Ziyin looked back at the past, he realized that he had already experienced the ordinary life he once expected.