The Omega male in the abo world (the female beta who broke out from the crowd of alphas to embrace the omega)
Snake orcs in the world of orcs (traveling through the world of orcs, a girl who became a different kind hugs and keeps warm with the snake people who are also a different kind)
Mecha warriors in the future world (the orphans rescued by the mecha warriors pledged themselves to repay their kindness)
The leader of the Hehuan Sect in the world of cultivating immortals (the handyman counterattacked and brought the beauty home)
The head of a cross-dressing family in a world of female supremacy (dressing as a woman meets pretending to be a man)
The flaming knight in the fantasy world (the beautiful knight saves the beauty and earns a heart)
A weak man is bullied in the supernatural world (the ghost girl stands up to protect the man)
A mermaid in the mermaid world (death to get her husband back to earn military merit)
The elves in the elf world (the male protagonist of the elf queen and the female protagonist of the breeder)
Little goblin in the goblin world
…
I'll add it later when I think of other worlds.
The heroine has no memory, one world and one story, and the people are just those two people.