Use first and repay later: Advance the future cultivation fruits - Chapter 15: Perfect Match

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

MC (female protagonist) dies in a plane crash and wakes up in the body of a beautiful but corrupt and lascivious prime minister in ancient times, Zhang Qinglian. As circumstances decree, he (she) cannot reveal that the original owner’s soul is gone else calamity might occur. So he (she) decides to walk a righteous path, determined to help the lovely but simple little emperor rule the country. Not backing down after facing torture, not losing courage, destroying rebellions and facing off with scheming princes.

- Description from Novelupdates

A simple childhood love story.

The female lead’s name is Xiao Tu (Bunny) and the male lead’s name is Ling Chao (Super). As neighbors who were born a month apart, they grew up, went to school, and graduated together.

Tu Tu is a cute and good girl. Even though she’s not really smart, she’s not stupid. Since she is skilled in martial arts, the guys are scared of her.

Ling Chao is smart and cool, but also stuffy and quiet. He is the brainy type who excels in studies.

Tu Tu’s mother wishes her daughter would grow up and marry Ling Chao, but her father disagrees and wants Tu Tu to get to know other boys.

- Description from Novelupdates

Kai of the Sorcerer’s Tower is one of the last mages left, barely surviving in a world ruled by creatures of the dark — where the era of mages ended, and most of the lands got contaminated with dead mana. To save his world and fulfil his master’s last wish, he put himself through a forbidden ritual, risking his soul being ripped into pieces to make his way into the past. In an era with abundant mana — an era yet to enter the Golden Era of Magic. Things go wrong, of course, as they always do, and he finds himself thousands of years before the world fell to mana contamination — in the body of a young lord, Arzan. All is not well, though, as the young lord was murdered by someone right at the cusp of a beast wave threatening the territory, while larger threats loom on the horizon. There was a lot to do for Kai to regain his former strength in this time of primitive technology, but then again, he might just be able to change that.