Oathbreaker (Gamebreakers #5)

She was never supposed to be mine.
Walking away was the only acceptable decision.
It was just one night. Two lonely souls finding solace in the one place we shouldn’t have—my bed.
I thought once would be enough, but leaving her is my biggest—maybe my only—regret.
Now, I’m back and seeing the results of that night is killing me.
I’ll make it up to her. I have to. Because I’ve never loved anyone else.
Because I’d rather die than break her heart a second time.
But when duty calls, I swore an oath to listen.
And I know…
There will be no coming back this time.