[Imaginative premise, no harem, no formulaic tropes, not invincible, sibling-focused, humorous commentary]
Overworked office drone Fang Chuan has a sudden idea and types “I want to cultivate immortality” into an AI.
“Hmm, the user entered ‘I want to cultivate immortality,’ so they seem interested in this topic.
...Searching for the keyword ‘cultivation of immortality’...
Based on publicly available information, ‘cultivation of immortality’ is a fictional concept in literature and legend involving abilities beyond ordinary physiological limits, with no evidence that it exists in reality. However, I can generate a ‘simulated experience guide’ based on related cultural symbols, for entertainment purposes only:
Important: The sensations and cultivation techniques described above can all be explained by modern physiology and will not trigger any ‘supernatural abilities.’ If you experience anything unusual, it is more likely a psychological effect caused by focused attention.”
Fang Chuan tries following the instructions, only to discover that they really work. The AI’s advice can actually help him cultivate immortality.
Overwhelmed by a mixture of elation and doubt, he gradually steps into another side of the world...