Here is the more detailed warning list for "The Snowdrop Diaries" (contains spoilers).
I hope I didn't forget anything.

- blood, violence, death, murder (text description and CGs)
- death of strangulation (text description and CGs)
- execution/death by burning (textless CG)
- depression, anxiety, mental breakdown
- psychological trauma (implied)
- child abandonment (mention)
- death in childbirth (mention)
- self-reproach

Also mentioning these just in case:
- sexist remarks? There is a female character who is not fond of men and calls them bad names (such as scoundrel); she does respect the (male) village chief though.
- child abuse? There is a teenage girl who gets scolded often; said girl also receives such punishments as being locked in her room and being burdened with lots of chores.
- unreliable narrator? (not sure about this one, but the narrator is very naïve)

We tried to avoid sensitive religious themes (the religion in this story is fictional, even if it was inspired by Christianity), but the story does take place in the monastery and most of the characters are nuns and novices, and they do talk about sins, demons, prayers and (fictional) Saints.