Let the Right One In (2008)

[samvara]

Swedish romantic horror based on 2004 novel John Ajvide Lindqvist.

Directed by Tomas Alfredson. With Kåre Hedebrant, Lina Leandersson, Per Ragnar, Henrik Dahl. Oskar, an overlooked and bullied boy, finds love and revenge through Eli, a beautiful but peculiar girl.

This is unquestionably good, it's well written and well made. I'm only on the fence about recommending it because the psychological horror elements fall into the genuinely upsetting zone for me personally. The contrast of supernatural and human evil, the cruelty to children, and the grooming were very well done and if you're into those themes this is a masterpiece.