I think it looks good, the plot setting is interesting, the follow-up development is good, and the tension is also very good. I saw a star dropped at the end, because it always felt a bit awkward. But the meaning of the ending may be that the serial killer is no longer a person but a monster because of some characteristics or lack thereof.
Or another weird metaphor for a teenage psych movie—killing the monster in your heart for love, it sounds plausible.
I don't think I need to be surprised that the male protagonist is calm and bold. The psychologist diagnosed him as anti-social. The male protagonist feels that he is emotionally deficient, and his reactions and feelings to many things are very different from ordinary people. It's also why the male protagonist wants to stay "normal" and why the movie is called "I'm not a serial killer".
ps: 1. The overall tone of the movie is really small, fresh and bright. 2. The male protagonist gives me a very similar feeling to the male protagonist of viral antibodies. They are very similar in all aspects, but they are not the same person after checking.
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