The Mermaid Who Sells Health Supplements (Quick Transmigration)

First world: An alternate ancient era - the human race's ruler × a big shot of the fish clan

Top: He kindly rescues a little animal, only to get conned into taking responsibility for it. Not only does he have to care for a mermaid and her underlings, whose appetites are measured in tons, but his life takes a sharp turn and becomes nothing like what he expected.

Bottom: After consuming the sacrificial offerings of countless wronged souls, he must return to before it all began and change the fate of hundreds of thousands of souls who died unjustly. Whether he can do it is another matter. For now, he's hungry. If there's no one to eat him, he'll eat them.

Second world: Modern entertainment industry

A CEO on the verge of bankruptcy in three days × a gold-digging bottom with no money but a taste for delicacies

Third world: Interstellar internet celebrity