He was looking for a time-travel novel where the female protagonist was turned into a kitten after traveling from the modern era to the ancient era. The male protagonist was the emperor.

I don't think it will meet your needs, but I'll try my best to recommend a novel that is most relevant to your description."The Adorable Pet of Time Travel as a Concubine" is an ancient romance novel written by the author Yan Baiwan. The general plot of this novel is as follows: After transmigrating, she had actually arrived at an era where she was a nobody and had even become a little kitten. That damned emperor actually kept her as a pet! Wait a minute, she was also considered a "royal cat"? However, something didn't feel right! She had to quickly find a way to turn into a human! Cute Pet Kitten cultivated to become a human, on the cultivation of the cat slave emperor... ---------------------------- My Queen is a Cat was an ancient romance novel written by Gu Miaomiao. The general plot of the novel was: She had transmigrated and turned into a cat? Or was it a British Shorthair with a big face and short legs? Be reasonable, even the heaven-defying system cheat could not make up for the critical blow to her heart! Oh, if she wanted to change, she had to help the man whose birth mother died early, who was despised by the emperor, and who was treated as an abandoned son by everyone to ascend the throne? But what else could he do besides petting cats? The Emperor replied,"I will still flirt with you!" ---------------------------- "Traversing to Ancient Times to Be a Demon Concubine" was an ancient romance novel written by the author, Really Cute Kitten. The general plot of this novel was: She was originally a monster hunter from the 21st century in Parallel World. However, she had a conflict with her master and fell off the cliff to her death. Unexpectedly, she was reborn in ancient times, in the Daliang Dynasty, and became the Emperor's favorite concubine. She could only blame herself for being too good-looking and being repeatedly schemed against by the concubines in the harem…"Emperor, please don't spoil me anymore ~""Beloved Concubine, when I regain my power, I will make you the Empress." Ps: This article is more of a daily routine, easy and funny. ---------------------------- "The First Daughter of the Prosperous Age of Time Travel" was an ancient romance novel written by the author, The Playful Cat. The general plot of the novel was: Yu Qi, a modern female medical scientist, unfortunately encountered a plane crash and accidentally transmigrated into the Prime Minister's wife's daughter. She thought that she was about to start a vigorous ancient life, but who would have thought that the first thing she opened her eyes was to be abused? F * ck, do you think I'm easy to bully if the tiger doesn't show its might? Let's see how she used her superb medical skills to reverse the world from an unfavored and oppressed little girl to a brilliant empress…The plot is fictional, please don't imitate it. ---------------------------- "Crazy Concubine" was an ancient romance novel written by the author, Meowth. The general plot of the novel was: She was a descendant of an ancient martial arts family from the modern era. She was skilled and ruthless. In a single day, she had transmigrated and become the eldest daughter of the General's Estate. Her status was extraordinary, but she was bullied. How could she allow anyone to bully her? Those who had offended her would be paid back one by one. He was the high and mighty crown prince, black-bellied and cunning, but he only cared about her. The palace gate was like the sea, and he wanted to share the mountains and rivers with her… ---------------------------- "Bad Concubine: The Evil King's Revenge" was an ancient romance novel written by the author, Little Meow. The general plot of this novel was: It was fine if he transmigrated! She was originally a 21st-century secret agent girl, but she had transmigrated to become the daughter of the Marquis's family and married a prince who had disappeared for a few years. She had even met a group of strange relatives. From then on, she had started to occupy the family and become king. She had abused the scum to become rich, and she had also gained a magnanimous path of love. When a woman with a strong comical attribute met a black-bellied man with a vest, lightning would strike. As they talked and laughed, they made love, and as they held hands, the world was beautiful. They thought that it was a carefully planned conspiracy, but they didn't know that it was a joke about chasing love. ---------------------------- Cat Slave Prince: Concubine Meow in My Arms was an ancient romance novel written by Ta Ta Ge. The general plot of the novel was: She had transmigrated into a cat! The first time a man saw her, he said,"This cat is cute." ---------------------------- I Have the Female Lead's Halo After Transmigrating was an ancient romance novel written by the author, the idiot detective. The general plot of this novel was: She had accidentally transmigrated to a dynasty whose history could not be read, and she had even become an extremely ugly young lady of the Prime Minister's residence. Her first reaction was,"Can you please show me some favor, transmigrator?" This Host was too pitiful. Forget it, since she was already here, she would torture the scumbags when she was free and fall in love with them… ---------------------------- "I'm Really Not a Pervert in Time Travel" was an ancient romance novel written by the author, Mao Shanxing. The general plot of this novel was: After the female protagonist transmigrated into the young master of the Prime Minister's residence, she met all kinds of ancient men and women in their prime. The female protagonist is a rational and slightly mature child. Only smart and cute women will be liked. Everyone in the novel is a cute and sincere person. I hope readers will like this male protagonist. If you haven't decided who he is, I might listen to your opinion. ---------------------------- [Laughing Time Travel: My Beloved Concubine, Please Turn the Tide] was an ancient romance novel written by the author, Prince Yue. The general plot of this novel was: He was domineering, arrogant, arrogant, condescending, and cruel-sorry, this was the daughter of the Prime Minister. She was gentle and easy-going, humble and polite, loving harmony and merciful. Sorry, this was the king of a country. One must be careful when reincarnating, transmigration is very confusing! Or was the A cup already very miserable? Why did he have to add another cup? He grabbed her collar with one hand and said domineeringly,"Marry me!" She was dumbfounded and broke out in cold sweat. This, this, this, the most arrogant concubine in history was about to be born? When his distorted life was straightened out, he sat back down as the emperor, but he still pestered her endlessly. However, the tiger that loved to be angry had turned into a smiling cat. His temper was extremely good."Beloved Concubine, please turn the tables!"“…” [This is a funny story about the exchange of souls between a man and a woman. The female lead is heartless, and the male lead is shameless. If you like it, you can keep it ~]