There is this BL novel that I have been looking for so loooong. It's just pure torture searching for it, I swear. The main character's name is Nazareth. It was double transmigration. He was once an illegitimate child in there aristocratic family. And, he's dead set psycho in competing against his little brother, a legitimate heir. Then, he died obviously, but he was reincarnated in present world. He became a doctor and he died again. He went back to when he was in his teens. Your help is greatly appreciated. Thanks!
The Reincarnated Villainous Young Master’s Guide to Happiness ? https://www.webnovel.com/book/(bl)-...master’s-guide-to-happiness_16638830206780405