In general, it can be safe if you use it from trusted sources and follow proper online safety guidelines. However, there's always a chance of coming across malicious ads or fake links.
The system in a modern world novel can also be a technological one. Take 'Neuromancer' for instance. The cybernetic system in this novel is not just a backdrop but an integral part of the story. It affects how characters interact, communicate, and even think. The system here represents a new kind of world order that the characters must understand and manipulate to achieve their goals.
The storyline of 'A New World' manhwa is quite engaging. It involves the protagonist's journey to uncover hidden secrets and overcome various challenges in a strange and wonderful world. There are unexpected plot twists and character developments that keep you hooked.
The manhwa leveling system usually involves characters gaining experience and completing tasks to increase their levels and unlock new abilities or skills.
In manhwa with a leveling up system, you'll notice that the challenges faced by characters increase as they level up. Also, it often provides a sense of growth and progression for the main characters. Sometimes, it can even introduce new elements or game-like mechanics to keep things interesting.
He could find a novel that met the requirements, which was " Ka Dazuo's Relatives, It's Fair to Take Over His Legacy, Right?" This novel told the story of a modern city. The protagonist had transmigrated to become a king and had the help of the system. However, other than this novel, the other search results did not mention a novel that traveled through the modern world to become a king and had a system. Therefore, other than this novel, I don't know of any other novel that meets the requirements.