Naruto System in One Piece - Chapter 17: Rasengan

Su An was thrown into a world of quick transmigration by his suitor, who attempts to approach him with a different identity.

Hidden dangers can not be prevented, but fortunately, with sweet words and beauty, Su An has won the love of the big bosses from each world.

An indifferent painter suffering from mental illness, a flirtatious bandit young master from a wealthy family, a demon monk with powerful martial arts skills…

To Su An’s surprise: Every big boss is poking my appetite!

The big bosses who got hooked up: …

They all gave a meaningful smile.

- Description from Novelupdates

Betrayed by her boyfriend in the most humiliating way, She seeks solace in a night bar that leads to an unexpected turn—she finds herself pregnant with quadruplets, and the father is a gigolo!She thought it was merely a fleeting encounter, she returns home only to discover he's transformed into the city's most influential CEO.Struggling as a single mother, she's caught off guard when fate brings them together again. He recognizes her, and traps her...

When I cleared the final chapter of a game that was a national failure, I became an unnamed side character in it.

A non-standard, unmeasurable, EX rank supporting character.