The Ballad Of Songbirds And Snakes - specifically the 10th Hunger Games and time as a mentor - told through the perspective of Livia Cardew.
This story is AU at some points.
"Who ever thought a Capitol girl would fall for a District girl, huh?"
"Not me"
When Reef Murphy was reaped to represent her District in the 10th annual Hunger Games she expected to die protecting her young district partner.
She didn't expect to find love, let alone find it in her Capitol assigned Mentor.