skygiants

That sounds like an Asian drama –
1. Vaguely incestuous codependent sibling relationship – check
2. Family tragedy – check
3. Female family member sacrificing all for everybody else – whether they want it or not – check
4. improbably successful, handsome, or competent male lead inexplicably attracted to 3 – check
5. Sudden, not necessary for plot, death that just sucks any possible joy out of the story – check

The psychic who doesn't want to be a psychic and therefore avoids places she has come across ghosts reminds me of a character in "He is Coming to Me." https://mydramalist.com/31880-he-s-coming-to-me