"It's okay. You're safe now" vibe

Basically, I want to read books with not only loads of hurt/comfort but also a (can also be literal!) "it's/you're okay, you are safe now" thing. One character gently showing the other that they're indeed safe and protected and well-cared for. That they can let go and just focus on themselves and also the relationship.

There can be many reasons for that, e.g. an abusive home/relationship, bad experiences with people, maybe even something supernatural? I'm open to anything!

CR preferred, but I won't say no to any other genres. F/F or M/M preferred, but M/F or poly is fine as well.

Thanks!