Born to a mother who used him to get money, Geng Yuan is an illegitimate child who's always been careful to keep a low profile and struggle to survive.
Then one day, a humanoid creature named World shows up and tells Geng Yuan he's his father.
Geng Yuan, who has suddenly gotten a new dad and inherited a world: ...
Not only his values, his entire worldview has been turned upside down!
After working hard to rebuild his worldview, Geng Yuan sets out to save his newly acknowledged father. Taking his little shop with him, he sneaks into other worlds and begins trading with people blessed by great fortune.
In short, a poor little nobody suddenly becomes a big shot. Guided by the principle that accepting favors means owing something in return, he sneaks into other worlds, opens a shop, and sells things to the protagonists to interfere with their destinies, collect reversal crystals, and save his "father."
