Vile Heart by Lola Malone

Cor Night is upon us.

It’s the one night a year when even the school encourages the Black Harts to act out on their vices, and more than ever, Camren Ryka is ready to break open the memories that have been kept stored in the back of his heart with lock and key for way too long.
There are rumours. But rumours can be tricked. There are lies. But lies can be bent. Not Camren—he won’t yield to anyone. He has come out tonight to reclaim who’s his.
Davian Mink. His best friend, his everything, his secret crush. From a young age they shared their life, until two years ago, when Davien threw Camren out. Out of his home and out of his life.
Davian is stubborn, and proud. He’s also afraid. Because the mess he calls his life has been created by his own hands. What’s worse? He secretly hopes that the Black Hart will come for him tonight and honour the promise he made when they were friends. But such honour always comes with a price. After all, there’s only one rule for Cor Night.
Be vicious with your vices.