Ren Kagetsura, an exiled samurai, just wanted to live in isolation at the edge of the Goblin Forest. But when he kills a zombie to save his own skin, he accidentally triggers the "Old Law of the Betrothed"—an unbreakable magic that binds him to a tiny goblin girl he didn't even know was there. Zizzu, a fierce guardian of the ancient code, sees the law as absolute fate. Ren sees it as a massive headache. Now, forced into cohabitation, this grumpy warrior and his tiny, broken-English-speaking fiancée must navigate cooking disasters, cultural clashes, and the shadows of their painful pasts. Between a spreading zombie plague, a mysterious guild, and the secrets of the deep forest, they'll discover that the Old Law might not be a curse after all—but a second chance at love. Tags: Fantasy Romance, Slice of Life, Romantic Comedy, Slow Burn, Cohabitation, Grumpy/Sunshine, Non-Human Lead, Magic.