This novel might be 'The Monster King of Campus: Half-Time Traveler'.
I recommend the book "The Origin of Magical Beasts". The protagonist was born into a peasant family in Lordaeron. On the road of pursuing power, he defeated a monster that was thought to be a grade-1 monster, only to find out that it was a grade-9 monster. I hope you like my recommendation, Mwah ~π
According to the information provided, it could be an anime or a novel in which the main character was attacked by a monster after school and the female protagonist resurrected him. The protagonist's body could take the form of other people, which attracted his attention and he decided to investigate this matter. There might be other scenarios, such as the protagonist meeting other characters who investigate the incident together, or the protagonist discovering some secrets in the investigation. It is recommended to provide more information to answer your question more accurately.
I recommend a light novel called "One Man Begins to Invade the National Manga World" to you. This novel followed the clues of the chat group and brought the protagonist into the world of the heavens, exploring the various mysteries and splendor of the Chinese comic world. Although it wasn't a doomsday novel, there was still a plot of a sudden invasion. The main character's IQ was on the line. Like other Doujinshi novels, his words were slightly scheming. I hope you like this fairy's recommendation. Muah ~π
I recommend 'Mistaken School Hunk: Prince Charming Is a Demon Hunter' to you. This novel told the story of a young school. The male protagonist enrolled in Bixi Second High School, only to find out that it was a monster high school, and he became a monster hunter because of his special " talent." In this school full of monsters and magic, full of thrills and excitement, the male protagonist ushered in a series of battles with monsters and growth stories. I hope you will like this novel.
" After 300 Years of Cultivation, I Suddenly Discovered It's Wuxia " was a Xianxia novel. It told the story of the protagonist, Cui Heng, who transmigrated to a high-level Xianxia world and began his 300-year journey of cultivation. However, 300 years later, he discovered that this was just a martial arts world. This novel has been completed, with a total of 568 chapters. You can read it for free on Red Bean Literature Network.
Many of these novels could be called " Crossing Strangers,"" Crossing and Rebirth,"" True Love of Crossing in the Future," and so on. It was very common in novels for the female protagonist to transmigrate into someone else's body for the first time, fall in love with the male protagonist, and then die and transmigrate back to the modern world. Some novels would even describe whether the relationship between the female protagonist and the male protagonist would change in the modern world.
"Prince Charming, Please Don't Hang Up" might meet your needs. The plot is that the protagonist, Gu Zhouzhou, becomes a cannon fodder mother who died at the beginning and is reborn back to high school to be in the same class as her daughter. I hope you like this fairy's recommendation. Muah ~π
Fang Xiaoru killed 873 people. The fact that Fang Xiaoru's ten clans were exterminated was recorded in many documents, including Ming Chongzhen's "Ninghai County Annals: Fang Xiaoru Biography","Ming History Chronicle" and Huang Zongxi's "Fangzheng Learning Xiaoru". These documents clearly recorded that Fang Xiaoru was exterminated by ten clans, and the number of dead reached 873.
If you like stories of adventures and treasure collection, I recommend Sword Immortal Cultivating in the Other World to you. The main character of this novel cultivated sword intent in another world. He walked in a fantasy world and met elves, giant beasts, and dragons. He became a sharp sword and all living beings bowed to him wherever he went. If you're interested in fantasy sword and magic novels, don't miss it. I hope you like this fairy's recommendation. Muah ~π
According to my knowledge of novels, there doesn't seem to be any novel that matches your description. However, if you can provide more details or plot clues, I can try to help you find similar novels.