A Guide to Rising to the Top in a Strange World [Infinite]

[My next book is Even Ghosts Are Afraid of Me. Please add it to your reading list!] Lu Jiamu has a condition: He was born lacking ordinary human emotions. So when his close friend went insane and died mysteriously, leaving him a bizarre diary full of garbled text, he didn't immediately get scared, throw it away, and run. Instead, he flipped through it with great interest. Then he was dragged straight into a strange, unknown world... On his first day in this world, he looked at his panicked teammates and asked expressionlessly, "Am I supposed to be scared?" His teammate: "What do you think?" Lu Jiamu hurriedly imitated them, putting on a fake look of terror. But... At a haunted school, a bloated, corpse-like, deformed teacher stood at the lectern, staring at them coldly. Lu Jiamu smiled sweetly and approached the teacher without the slightest awkwardness. "Hello, teacher~" At midnight, a long-haired female ghost, soaked and bruised purple, slowly climbed out of a well. Lu Jiamu kicked her back down after she had struggled so hard to climb out. "Get lost!" His teammates: "...?" The female ghost: "...?!" In an old mansion, the lady of the house took her head off and gave them a malicious smile. "Like this..." Lu Jiamu quickly sewed her head back on and patted her neck. "Now you're all in one piece again!" The female ghost: "?" On a moonless night, sticky tentacles emerged from the shadows, coveting the warm bodies of the living. Lu Jiamu took out some utensils, wearing a big, fake smile and eyeing the tentacles' bodies just as hungrily. "Since you're already here, why not stay? Let's have takoyaki together." And then... The monsters of the strange world trembled in fear. Having found himself a new source of fun, Lu Jiamu pressed a finger to his lips. "Shh... Next!" Reader's guide: The ghosts and monsters cannot be defeated, but they can be contained. Includes some horror elements. The characters do not return to the original world midway through. The main group remains fixed and will not grow. The main characters are ordinary people, and there are no special items. Theme: Becoming an upstanding young man in the world of dungeons