The Happy One: A Quick Transmigration Side Character

Ruan Ying is a koi spirit.

She had only just taken human form when she met the Happiness System.

The System, ready to raise a child, had even earned a whole stack of certificates after seeing its newly transformed Host.

Who could have guessed what would happen next?

Ruan Ying: Woohoo! We're taking off!

The System, swept along for the ride: ...

So the wish-granting koi really is real!

World One: The clueless biological heiress

World Two: The only beautiful cousin left in the comparison group

World Three: A background Beta freshman in an ABO novel

World Four: I have money, and you love money

World Five: The white moonlight replaced by a substitute

World Five: An immortal's tribulation

World Six: Childhood sweethearts