1(Thai Bls)

An omegaverse Au where Kim(omega) sleeps with Porchay(alpha or beta) before the kidnapping and ends up pregnant.

When he finds out, Kim fear for the life and future of his child so with the help of Big(omega), who also found himself pregnant after a drunken one night stand with Kinn and Porsche, they run away to Korea to a distant cousin of Big that not even Korn knew about who agreed to help them hide from everyone and raise their children in peace.

Things go similar to canon for the rest of the characters(or if whoever decides to write it has any ideas, they can change how things go) but mourning for Kim and Big as they faked their deaths to run away.

Many years later after running away, Kim and Big return to Thailand with their children(maybe Rain from LITA or Shin from 3 Will Be Free for KimChay kid and Kawii Be My Favorite or Arthit from SOTUS as BigKinnPorsche kid? It's up to the writer if they want to use characters from another series or original characters) as their children wish to study in the country their parents were born at and Big's uncle said it was safe for them to go.

As you can imagine the other children of the canon ships of Kinnporsche meet Kim and Big's kids and become close until they decided to meet each other's parents(by separated or by planning a dinner were they would all meet each others parents, is up to the writer) and then you can guess that chaos, shouting, tears, etc will come as the truth will be revealed.

Really, as long as the base idea is the same anything else is up to the writer.