There was a novel in which the main character was the number one assassin, who was good friends with the number two assassin. The number two assassin was a pianist.

" The Killer's Knife " is an urban supernatural novel written by the author Bloodthirsty Age.CS. The general plot of this novel is: One Blade Assassin, the king of darkness, the King of Hell's speaker in the human world, ranked third on the world's assassin rankings. The killer's rule was to stick to one's heart and slaughter the darkness of the world! " I'm an assassin, an upright assassin. I've seen all the warmth and coldness in the world. I'm not doing it for money or fame. I'm only doing it for justice." ---------------------------- The book " The Valiant Assassin " was a fantasy novel written by the author, Ji Wushang. The general plot of this novel was: The assassin's story, the adult's story. How did the sincere youth become so cynical here… ---------------------------- " Master Assassin, Be Obedient " was an ancient romance novel written by the author, Yi Xin Zhi Yue. The general plot of this novel was: Ancient through ancient. The ignorant and hot-blooded girl traveled back in time and space twenty years ago. She wanted to raise the world's number one assassin into a kind gentleman. Twenty years ago, he was a black-bellied little boy with a miserable life, while she was at the age of adulthood, bright and moving. She rescued him from his predicament, endured hardships, took good care of him, raised him with all her heart, and encouraged him to become an upright man. However, when he was most attached to her and needed her the most, she left without saying goodbye and abandoned him. Twenty years later, he would be the number one assassin in the world, dominating the martial arts world, unyielding and unruly. He traveled the world and searched the martial arts world, wanting to kill her to vent his hatred. However, when she appeared in front of him again, with her young and beautiful face, he could not bear to part with her… ---------------------------- " Bloodthirsty Killer: The Moment of Encountering Demons " was an ancient romance novel written by the author, Shi Guya. The general plot of this novel was: In the world of assassins, there was only trading and killing. Living meant killing. A sword to the throat was the best sacrifice for the dead. Heartless, can not worry about; Only when there is no desire can you survive in the world. If he fell in love, he would be digging his own grave. When the woman's lovable face kept appearing in his mind, his cold heart gradually warmed up. When I am alive, I will protect you for a lifetime. If I die, I will kill all the people in the world. ---------------------------- " History's First Violent Mad King " was a fantasy romance novel written by the author, Po Hebao. The general plot of this novel was: There was a scheming black-hearted wolf here. There was also an arrogant and vicious wolf. In addition, there was a pure little lamb that had been raised by two wolves… Growing up would tell you who was the better one, black-bellied and black-bellied, wolves fighting wolves. When the two kings of assassins of the 21st century met again, would it still be a life-and-death battle? King of Assassins + Queen of Assassins, two-faced + two-faced, a strong combination. ---------------------------- " The Throne of Berserkers " was a fantasy novel written by the author, Edgeless Heavy Sword. The general plot of this novel was: If he was a man, he would be an assassin. If he was an assassin, he would cultivate the Indestructible Body of Vajra, the Dragon Elephant Compulsion, the Tiger Roaring Golden Bell Shield, and the Mad Demon Violent Sword Slash to crush all enemies! I, Xiong Ba, am an emotionless killer! ---------------------------- " The Killer's Beautiful Wife's Powerful Return " was a modern romance novel written by the author, Fu 'er. The general plot of this novel was: In her previous life, she was the famous number one assassin. She was ruthless and vicious, but she was betrayed and died at the hands of her companions. Returning from purgatory, trying to play tricks? Let's see who can beat who! ---------------------------- " Hate You to the Bone: A Defiant Agent Can't Be Trifled with " was a modern romance novel written by the author, Yi Gong. The general plot of this novel was: She was a killer, a cold-blooded killer, until she met him. Whether it was his appearance, personality, or behavior, he was not the type of man she liked, but she fell in love with him. He had a woman in his heart for a long time. When they met again, that woman had long forgotten about him. This time, he swore that he would never let go again. This love that had been pursued for a thousand years, who would win and who would lose in the end… ---------------------------- " The Strongest Wolf King Warrior " was a novel written by the author Jiu Guliang. The general plot of this novel was: [Strongly recommended by the chief editor] The return of the Wolf King, unparalleled iron fist! He was extremely cruel to his enemies! To her lover, she was so gentle that the ice melted! He was loyal to his brothers until the last drop of blood was shed! ---------------------------- The book " Instant Upgrade " was a fantasy novel written by the author, Red List. The general plot of this novel was: If you felt that your realm was too low, you would slash your enemy and your realm would instantly rise by one level! If you feel that your cultivation technique is too Low, you will slash the enemy nine times and your cultivation technique will instantly increase by two levels! If you feel that your martial arts are too lousy, you will slash your enemy eighteen times and your martial arts will instantly level up by three levels! If you feel that your broadsword is too blunt, you will slash the enemy eighty-one times, and your broadsword will instantly level up by nine! No matter who is injured, you can gain damage points to level up.

The novel "King of Eternal Night" was named King of Eternal Night! It was an Oriental fantasy novel. It told the story of a male protagonist who rose from hardship and fell from betrayal. He walked between eternal night and dawn with a gun, but he walked out of a legendary story. Although Eternal Night was destined to be his fate, he still wanted to become the ruler of the world. I hope you like this fairy's recommendation. Muah ~😗

I think the novel that fits your description is "Killer Babysitter". The male lead is also a world-famous killer. After having a relationship with the female lead, he decides to run away from his pursuits and start living an ordinary life in the city. I hope my recommendations can meet your needs. If there are other novels that you need to recommend, feel free to tell me ~

This novel was called " The Beauty of Time Travel: Spirit Master ". The main character was called Netherworld, and he was a deadly killer of the world's largest assassin organization. After she transmigrated, she became the well-known Sixth Miss of the country. She had many shortcomings such as ugly, stupid, mute, disabled, and sick. However, with her amazing talent and hard work, she became a killer known as the " Bloodthirsty Netherworld " in the Jianghu. I recommend this ancient romance novel to you. It's very interesting. I recommend it to you. I hope you like it.😋

In " Celebrating Years," the true identity of the number one assassin, the Shadow, was the younger brother of the Great Grandmaster Sigu Jian. At the same time, he was also the son of the former City Lord of Dongyi. He hid his identity and became Chen Pingping's chief guard. He was also known as the world's number one assassin. In the movie, the shadow experienced the bullying and humiliation of his family. In order to take revenge, he cruelly killed his father and the entire family, leaving only a young himself. Chen Pingping was the only person who knew his true identity. Thus, the Shadow was Great Grandmaster Sigu Jian's younger brother. He was an important and complicated character in the play.

I strongly recommend the novel The World's Most Loving to you. It's a modern romance novel about wealthy families. The female lead was the world's number one assassin, and the male lead was the president of the mysterious group. The relationship between them was touching, and Mr. Shen's love for her was enviable. If you want to read a novel with a rich plot and deep emotions, you might as well give this one a try. I hope you like my recommendation.😗

I recommend an ancient romance novel called "The First Assassin: The Heaven-Defying Sick Concubine". The male protagonist is a young master of the underworld. As the number one assassin on the list, he is very rich. I hope you like this fairy's recommendation. Muah ~😗

The name of this modern assassin novel was " Full-time Assassin ". The main character was Zhang Hao. Ten years ago, he was a top-notch assassin who was known as the number one on the leaderboard. However, for some reason, he left the assassin industry to become a cleaner. However, his enemies did not let him go and kept chasing him. In the novel, Zhang Hao had to constantly avoid the pursuit of his enemies and look for opportunities to take revenge.

This modern assassin novel was called Sin City. The story was about a protagonist who used to be a top assassin. He was forced to retire due to an accident and became a cleaner. However, his enemies did not let him go. Instead, they began to hunt him down. In the process of escaping, the protagonist gradually discovered the secret of his enemy and gradually unveiled a huge conspiracy. The plot of the novel was full of ups and downs, and the writing was exquisite. It was a very popular modern assassin novel.

😋I recommend Lost in a Fairy to you. It's a romantic youth-youth campus novel. The female lead, Pei Qian, was the world's number one assassin. However, she had become a 'stupid and ugly' heiress in the game. However, she was unwilling to be humiliated. She used her killer skills to level up and strengthen her body in the game, eventually becoming a strong person at the top of the world. There were many twists in the story and the characters were vividly portrayed. It was worth a look! I hope you like this fairy's recommendation. Muah ~😗