Hitched to the Shadow Creature by Eden Ember

When orphaned fisherwoman Aya submits to mandatory DNA testing, she never expects to match with a creature of living darkness—or that their forbidden bond might be the key to transforming their divided world.

In a world where humans are governed by monsters and forced into arranged marriages based on DNA compatibility, an orphaned fisherwoman and a shadow creature find themselves unexpectedly matched despite centuries of separation between their species. As they navigate their hasty marriage, they discover their unprecedented bond threatens powerful figures who have been manipulating the matching system for generations. With assassins hunting them and their own abilities evolving through their connection, they must expose a far-reaching conspiracy while fighting for a love that could either tear their world apart or heal it forever.