Wortenia Senki (WN) - Volume 5 Chapter 34

Eighteen-year-old Chen Yuan experienced the first love of his life, but it was an online relationship.His girlfriend was lively and cute, quirky and mischievous, and very good at making people happy. Chen Yuan thought she must also be an adorable girl in real life... As it turned out, when she appeared, she was wearing high heels, with an elegant and intellectual demeanor, and was his university professor?

Bai Yu traveled to the world of One Piece and activated the strongest swordsman system at the beginning.

No need to practice, swinging a knife will become stronger!

Thus, Bai Yu started his daily routine of wielding a knife.

Swing the knife 1000 times, and get the limit of physical strength – six styles.

Swing the knife 2,000 times to obtain the powerful Qinglong Sword Intent.

Swing the knife 3000 times, get three-color domineering.

General Huang Yuan: Bai Yu is the strongest rookie I have ever seen.

General Aokiji: My freezing ability was directly chopped into pieces by Bai Yu!

General Red Dog: Dangerous! My marshal position is about to change!

Hawkeye: Bai Yu is the number one swordsman in the world!

Since then, the name of Bai Yu has resounded throughout the world of pirates.

- Description from novelbuddy

Another entry in what you can call the Proto Harem Series: the books written before the Harem Series that take place in the same world.

It’s about a swordswoman whose student is captured, so she goes to rescue her.

Song Yaoyao had already died in her previous life. Her life ended on the day of her 19th birthday. Cause of death: heart failure.