Vows and Broken Bond by Meg Xuemei X

I knew the rules: red hair, dead before twenty.
But I didn’t know about him. Nero Ravencrux. The lethally beautiful professor… and the death god who loved me.
Hades built Reapers Academy to be my cage, my shelter. Our forbidden desire was our undoing. When we were discovered, he took the punishment meant to end me forever.
His sacrifice broke me open. And out came Persephone.
I remember everything. The betrayal. The cruelty. The torment to the male who was forced to watch me die, never able to follow. And I know the woman my mate trusted sold me to our oldest enemies, believing she could take my place in his broken heart.
I am the last of Persephone.