I recommend the following two novels with protagonists who can travel between the modern world and the other world: "I Can Enter the Game World" and "The Life of Lich Master Dao in Two Worlds". I hope you like this fairy's recommendation. Muah ~π
I recommend two novels," Foreign Space " and " The Other World Is Too Fierce, I'll Return to Reality to Show My Divinity ", to you. " Foreign Space " was a fantasy-alternative fantasy novel. The main character could travel back and forth between Earth and the foreign world, promoting the development of science and technology in the country where he was from." The foreign world is too fierce, I will return to reality to show my divinity " was an urban supernatural novel. The main character could also travel back and forth between the foreign world and reality. I hope you like my recommendation.π
The novel I recommend to you is 'The Absolute Master Dao'. The main character was a transmigrator from the modern world who was selling modern items in ancient times to make a lot of money. This protagonist has the ability to bring modern items to ancient times, which can be said to be in line with the plot you described. I hope you like my recommendation.π
πI recommend the following novels: "The Other World Is Too Fierce, I'll Return to Reality to Show My Divinity","I'm Sending Food in the Other World","The Human Battlefield in the End of the World", and "I Have a Wormhole to Earth". I hope you like this fairy's recommendation. Muah ~π
I recommend "The Emperor of Palaces" to you. The main character of this novel, Kazuhiko, entered a different world through a game with many modules. He could use modern items such as buckets to solve the problems of the Otherworld. At the same time, he could travel between the modern world and the Otherworld through a cliff. I hope you like this fairy's recommendation. Muah ~π
I recommend to you, I, who can travel and break through, will return to Earth to show my divinity! This light novel told the story of the main character Ye Yingjie, who accidentally obtained the Kunlun mirror that could travel between Earth and the Dou Qi continent. Then, he took the opportunity to travel between the three thousand worlds, and in order to obtain more power, he became stronger in all worlds. I hope you like this fairy's recommendation. Muah ~π
πI recommend two novels,"From the Fox Demon to the Contract of the World" and "The Red Envelope System". They all used different methods to make the main character invincible. He could travel freely in various anime worlds or other worlds and easily defeat his opponents. I hope you like this fairy's recommendation. Muah ~π
"I recommend the following novels with the main characters using technology to be invincible in the other world: Carry a Technology City, Myriad World Technology System, Black Technology Travel in the Other World, One Piece Technology Model, Technology King in the Other World, My Life as a City Lord in the Other World, Invincible Technology System, Subverting Black Technology in the Other World, Technology Emperor, and Sweeping the Other World with Intelligence. I hope you like my recommendation. Mwah ~ If you like my recommendation, please let me know at any time ~π
I recommend the following novels to you: 1. "The Strongest Overlord System": The protagonist is reborn in another world and becomes a useless young city lord. He uses the system to become stronger step by step, protecting his home and solving crises until the entire continent is afraid. This system novel is very much in line with your description of a novel where the main character has a system, and the main character travels back and forth between the other world and the real world. 2. "From the Descent of the Elves to the Real World": The protagonist of this novel, Chen Yinuo, woke up to find that the world had changed. This was a world where elves descended into reality and became mainstream throughout history. He obtained the system and transmigrated to a story about an elf descending into the real world. This novel fits your description of a novel where the main character has a system, and the main character travels back and forth between the other world and the real world. 3. <<The God of Salvation>>: Earth's loser brought the God-Hunting System across the other world. Was it a gorgeous counterattack or a tragic hit? What was that? You said that it was unfair for the protagonist to cheat with the system. There was never absolute fairness in this world! This novel is also in line with your description of a novel where the main character has a system, and the main character travels back and forth between the other world and the real world. I hope you like this fairy's recommendation. Muah ~π
πI recommend Legend of the Space Breaking Ring to you. The protagonist can travel to different places at will, including the 2D world, the novel world, and so on. He can also have the protagonist's magic treasure, time reversal, and other abilities. It's very suitable for your needs! I hope you like my recommendation, Mwah ~π
The novel I recommend to you is " Bringing the Galaxy to the End of the World ". This book is a sci-fi-doomsday crisis novel written by the author, Bao Bing Dui A. The protagonist brought the StarCraft system to the wasteland era. With the help of the Thunder God, she was able to travel back and forth between the apocalypse and the modern world, living the free life she wanted. I hope you like my recommendation.π