Keeping Humans in Captivity in a Low-Key Manner

Nie Li, who claims to be the guardian of the earth, is a 17-year-old humanoid creature with extremely destructive and controlling power. In the 17 years of his existence, he destroyed 96 contacts between alien civilizations and the earth, which not only protected the safety of the earth, but also eliminated the possibility of the earth's rapid development. ——She thought she was protecting humans, but she was actually keeping them captive. Mine clearance 1. The heroine is the most charming. 2. The love plot is missing, and there is no relevant content in the author's outline anyway. 3. The heroine is not human. 4. Please do not connect all science-related content with reality. It is all made up by the author's Wiki+ brain. If there are any logical errors, please point them out. If there are academic errors, there is no need... The update is random, the author is full now, and I am busy with my studies.