He loved him, and he gradually grew up in the other world and became a hero. Are there any novels that are similar to this genre?

I think you might be looking for the book Three Realms Express Delivery. The main character, Ling Feng, was a young man who delivered packages. After obtaining a magical jade ring, he was promoted to the Three Realms Special Envoy and delivered packages for the Upper, Middle, and Lower Realms, as well as the five races of immortals, demons, ghosts, and demons. This is also in line with what you said about the protagonist being a newspaper delivery man in the countryside. However, Ling Feng was not a teenager in this book, so his exact age was not clear. In short, the plot of this book is full of ups and downs. It's very exciting. I think you're completely worth reading! I hope you like my recommendation. Muah ~

I recommend the Eastern fantasy novel "Proud Zombie God". The male lead, Ye Qingfeng, had an ordinary background and ordinary talent, but he obtained the inheritance of the zombie race from another world, becoming a zombie god, looking down on the world. I hope you like my recommendation, Mwah~

I recommend "My Favorite Concubine: Emperor, Take It Easy". This ancient romance novel meets your needs. The male protagonist was the emperor, and the female protagonist had transmigrated and appeared beside the male protagonist in the palace. Although the female protagonist was disguised as a man, the male protagonist quickly discovered the female protagonist's true gender. The love story between them was also very interesting. I hope you like this fairy's recommendation. Muah ~😗

The plot of the story is that the male protagonist was betrayed by the woman he loved in his previous life. After his rebirth, he vowed not to be hurt by women again and gradually became a powerful martial god. Everything he did was for the woman he loved. This is a fantasy novel about a different continent. I hope you will like it! I wish you a happy reading. Muah ~

The novel I recommend to you is the Martial Divine Dome. This book is a fantasy novel written by the author, Mr. Shui. The story was about the Ye family entrusting the child of the protagonist, Ye Wen, to an old man in a village to avoid being hunted down. The father's life was unknown, and Ye Wen grew up to avenge his father's death. Our protagonist, Ye Wen, began to enter the Jianghu, slowly learned powerful martial arts, and finally took revenge and retired. The main character's parents lived with different children. However, the main character's mother was from a big family, so she followed her sister to another family, while the main character lived with her father in the forest. I hope you like my recommendation.😗

I'm sorry, but my answer doesn't seem to fit the plot you described. Can you provide me with more information so that I can answer your question more accurately? Thank you!

😋I recommend the following two novels to you: "Carrying StarCraft with You": The protagonist travels from the Galaxy Era to the other world, carrying the Tri-Race Base of StarCraft II with him. He could summon the combat troops built in the game space and lead the fleets of the three races to shake the starry sky and shake the Milky Way. In My Star Empire, the protagonist transmigrated to the command center of StarCraft II and became an electronic life form. From a small command center, under all kinds of difficult challenges, it grew into a huge interstellar empire. I hope you like this fairy's recommendation. Muah ~😗

I recommend the following two anti-war novels: 1. The main character of "The Anti-Japanese War Snipe Operation" was the assassin Zhao Zilong. He traveled back in time to the Anti-Japanese War and hid a major secret during the Japanese invasion. His goal was to kill the Japanese, eliminate the traitors, and dig up the treasure. The plot was tight and full of suspense. 2. "Taihang Zhijiang" tells the story of a young village official who graduated from university. He sacrificed himself in a rainstorm and was reborn into the Anti-Japanese War era. He chose to join the battlefield and fight for the country. From then on, he became a legendary leader on the Anti-Japanese War battlefield. The plot was cool and full of passion. I hope you like my recommendation. Muah ~

He recommended a novel called "The Concubine's Heart", which was an ancient romance novel. The female lead had transmigrated into the body of a concubine's daughter from the Great Zhou Dynasty's Marquis Fu. She had a legitimate mother, a legitimate sister, and other legitimate children to oppress her. She had an incompetent mother and younger brother to drag her down. She felt that she was simply a big supporting role in the "legitimate daughter XX in power"! But in reality, the female protagonist pretended to be weak and hid her strength. She was not a character to be trifled with. I hope you like this fairy's recommendation. Muah ~😗

I recommend the book "A Thousand Gold Farmer's Daughter". After the protagonist was reborn, he spent his life in a poor farmer's house in the Warring States Period. He helped his father earn money by doing real estate and opening a supermarket. I hope you like this fairy's recommendation. Muah ~😗