One Night in a Storm by Shay Savage

Two university students thrown together in the midst of a raging storm, one a Shibari expert, the other an instinctive submissive.
As the flood waters rise, so does Kasinda’s panic. When she allows Cree to use his expertise to ease her fears, she finds herself healing from the trauma of her past.
The floodwaters may soon subside, but their passion for each other is just beginning to grow. Cree may be the rigger, but it’s Kas who has his emotions in knots.