Feeling stuck and uninspired, Dull made the bold decision to step into the human world. To his dismay, he found humans rather dull, their forms of entertainment barely piqued his interest.  Everything changed, however, when a co-worker invited him to join in some games. For the first time, he felt a rush of excitement! This sparked a brilliant idea: what if he could transform this mundane world by weaving game mechanics into daily life? If a simple game could bring him such joy, just imagine the thrill of truly living within a game! With this newfound inspiration, Dull embark on an eccentric project. He aimed to develop a "System" that would enable people to enhance their bodies and acquire new skills, ultimately planning to introduce monsters for humans to face, thus heralding the beginning of an apocalypse. Observing the widespread suffering and loss of life, Dull expressed his satisfaction with a nod. His efforts had yielded results.  "This world is now perfect for my holiday." Before you start my novel, I want to clarify a few things.   1. Please look at the tags before reading. 2. One of the main characters is not human. They don't experience human emotions and doesn't care about human lives. So, even if he seems cruel, remember that he is not human, and try not to judge him harshly.   3. There are two main characters. The other one is introduced in the first volume, but they won't appear often. Even though this character is human, they are not a good person either, so don't be surprised if they are just as bad as Dull. 4. The main reason for having two main characters is that Dull is really boring. He lacks emotion and depth, which might make readers lose interest, that's why I recruited another character to bring more feelings into the story. 5. This story has a dark theme. The main characters are both anti-villains and the story's antagonists because I wanted to create truly evil main characters. They will do even worse than killing in the future.