Get in the ring, Daddy.

Dear best friend, I had sex with our daughter after you died.
🦪
Dora lost her father on her eighteenth birthday, and she swore to find his killer and end his life herself. Because of this, she signs a 'fight till death' deal with Umbra, a deadly secret organization her father worked with.
A fight where only one of the two fighters would walk out of the ring alive.
Dale Lazarus, a man secretly in love with his best friend's daughter, killed his best friend in a fight. One of them had to die for the other one to live, and it was Dora's father who didn't walk out of the ring.
Dora doesn't know this: that Dale Lazarus, her father's best friend, and also the man she's shamelessly obsessed with, is the killer she's after.
She swore to his face that she was going to wipe her father's killer off the planet, not knowing she was talking about him, and He trains her to kill her father's killer, knowing he was training her to kill him.
What happens when Dora realizes she signed a deal to kill the man she is obsessed with?
~
Content warning: This book contains several sensitive topics that may be disturbing to some readers. Reader's discretion is advised. Specific warnings include: Graphic violence and gore, Explicit sexual content, Description of grief and loss, and strong language.