I recommend an ancient wuxia novel with a male protagonist who is highly skilled in martial arts. At the beginning of the story, he loves a princess, but later the princess dies.

Here martial arts are no longer intangible legends. They have been passed on from generation to generation and from century to century. After the confrontation with science and technology, they have completely integrated into modern society and all kinds of martial arts competitions are taking place across the country as superiority among scholars are hard to reach a consensus but not as difficult among martial artists! Lou Cheng has inherited the lost skills of the greatest martial arts sect. Towards his original dream and the glory in his heart, he advances step by step, becoming the warrior of this modern city and the hero of the era!

Kurogami Ichiro was desperate because he couldn't achieve what he wanted when he once started his martial arts path at age of 8! 35 Years he spent training and honing his martial arts, but he always felt like he was born in the wrong era... And fate played its tricks and Ichiro lost his life while saving a young girl's life and no matter how much he trained his martial arts. He couldn't escape from death. But.. his story didn't end there... He reincarnated to a different world where martial arts and people with strength are targets of admiration... Can Ichiro finally reach his dream while having the assistance of the Martial Arts System? Martial Arts System seemed simple at first... But Ichiro will slowly find out... That the Martial Arts System is far from simple. ________________________________ Disclaimer: The cover is my own, made by Dini Marlina __________________ https://www.patreon.com/aesirproductions Me, alongside my friends, decided to create a novel. Please, check it out, and support if you enjoy it. I can promise, it's going to be a wild ride.

The dimensional rifts link the earth to the Xingwu continent. This is the dawn of the martial arts era! I will be useless if I don't practice martial arts? Don't worry, I have a system that allows me to pick up attributes. When other people drop attributes during their training, I can pick them up secretly. Huh? Did you just say that beating up people will make them drop attributes too? In that case... You defeated a sword skill genius. He dropped Enlightenment×2, Sword Talent×1... You've picked them up. Your insights have improved and you've gained a beginner stage sword talent! You defeated a blade skill talent. He dropped Blade Battle Technique×1, Malicious Blade Intent×1... You picked them up and learned a rare blade battle technique! You've also figured out Malicious Blade Intent and have become extremely fierce! You defeated a physique talent. He dropped Physique Scripture×1, Holy-Blood Dominant Physique×1... You picked them up and learned a new top-grade scripture! You are exceptionally lucky to have received the Holy-Blood Dominant Physique. It can change your physique completely and you earned a god-level title 'Endless Health'. Someone killed a powerful star beast and dropped Spiritual Sight×1 and Blank Attribute×60... You picked them up secretly and receive a spiritual eye talent as well as 60 points to add to any of your current attributes! You defeat many opponents in your life. You accidentally kill an innocent devil and split the universe into two when you're practicing your blade at home. You burst the sun with your fist and the world is engulfed in darkness... That's when you realize... You're invincible!

It was a dangerous era. Extraterritorial ferocious beasts occupied 90% of the living space in the world, while humans could only survive in a small space. Fortunately, some of the surviving humans awakened to genetic martial arts! Breaking the shackles of one’s genetics was the foundation of cultivating martial arts. Lin Feng, who was born with congenital disease, could not experience a breakthrough. However, by some fateful encounter, he awakened to the ability to merge genes. [Wild Bull gene successfully merged. Strength of genes has been improved!] [Mutant Earth Dragon gene merged. Earth Dragon Scales have been unlocked!] [Planet Behemoth gene merged. Ability to survive in outer space unlocked!] Lin Feng broke through the shackles of his genes and cultivated martial arts, becoming the most powerful person in the universe!

Transmigrating to a parallel universe, Ye Xiao's spiritual and martial arts skills were awakened. He became a librarian in the martial arts library and awakened the Golden Book Divine Soul. Upon seeing that there were skills to collect divine souls, Ye Xiao cultivated in them. When he maxes out the skill, he can even synthesize them into a higher-level skill. Seven basic blade skills can be synthesized to the Emperor Level Skill- Blade Dominance Nine basic sword skills can be synthesized to the Emperor Level Skill- Heaven Cleaving Sword Ten basic fist strokes can be synthesized to the Emperor Level Skill- Fist of Destruction Ye Xiao cultivated and grew, upholding the principle of not leaving before he became invincible. Many years later, the Star Beasts arrived and the human race was threatened. Tens of millions of people found themselves helpless, unable to defeat the beasts. A sword shot across the sky and he emerged from the gleaming light of the blade. "Those who threaten humans shall be eliminated!"

The interstellar boss, Zi Yi, has come back to life. Despite clearly being reborn as a daughter to a rich family with a dignified family on her mother's side, she just had to be screwed over by her stepmother's horrendous fostering and egged on to distance herself from her mother's family. Labeled by the people in her circle as a 'Rich, stupid, and shameless to the point of stealing her own sister's boyfriend' woman, Boss Zi Yi merely scoffs. 'Stupid? 'Allow me to show you the true power of the world's strongest brain.' "You're still a high school student, studying should be your priority." Zi Yi has to tilt her head backward to look at the tall and muscular man. Her tone is harsh when she replies, "You really do like poking your nose into others' businesses, don't you?" Cool as ever, Zi Yi slowly changes the ways of the world and how people think with the talents and abilities she had retained from the 22nd century. Nobles and high-ranking officials from the capital want to marry her, only for Zi Yi to reject Young Master He's roses and turn to get into her red sports car while the man who always likes to nag her has the entire Lu family kneeling with him on one knee. "I am the only person in the world who's suitable for you, Zi Yi."