Anime — Higurashi no Naku Koro ni (ひぐらしのなく頃に)

Interesting, occasionally gruesome — and if you don't realise that it was based on a popular game, slightly confusing with the reboots — mystery/horror anime. Very difficult to describe without much spoilerage, beyond the initial premise of the initial lead character being an outsider, new to a remote and insular rural community, where there are a lot of odd goings-on, and creepy little girls.

It had one “hardly bear to watch” sequence involving fingernails.