Knight Lux is summoned by the king and ordered to marry Princess Cronya. Determined to reject the engagement outright, he travels to her remote castle only to find that the princess is an eccentric who lives alone in a crumbling, rundown fortress. Despite his cynical nature, Lux is intrigued rather than repelled by her unusual situation. The two soon discover they share a certain secret in common, a revelation that transforms their reluctant alliance into a cooperative partnership. Together, they begin a new life within the old castle walls, dedicating themselves to an unexpected craft: building tiny homes for fairies. The story follows Lux and Cronya as they navigate their unlikely living arrangement, gradually moving from suspicion and duty to genuine companionship. As they work side by side constructing miniature dwellings, the narrative explores themes of healing, trust, and finding beauty in forgotten places. The setting is a fantasy world where fairies exist, and the couple's shared secret forms an ongoing thread throughout their daily adventures in miniature craftsmanship.