The World of Otome Games is Tough For Mobs - Volume 10, Chapter 12 “Tradition Event”

When a glorious old civilization was toppled overnight, a strange purple moon rose and thus began the Purple Moon Era.

Right after transmigrating into a parallel world, Yang Yi was a bit stupefied upon seeing a adorable little girl calling him father. Fine, Xixi is 100% my daughter, but my child’s mother is actually an aloof, absolute beauty who’s a famous singer.

How do I coax my baby? Yang Yi, who was a assassin in his previous life, scratched his head. How about I tell some stories? Yang Yi didn’t think that the stories he imported from his previous world would be famous world-wide! How do I bring back my child’s mother who left in anger? The experienced Yang Yi indicated that there was no problem a love song couldn’t fix. And if it couldn’t, then two songs!

- Description from Novelupdates

Crossing to One Piece world, he became Roger’s younger brother.

Seven years ago, Shen Qianshu is impregnated with Ye Ling’s child in an accident.Seven years later, the little boy becomes famous and is thought of as the nation’s son.