Set in a Japan where five ancient crystal pillars are guarded by families with supernatural abilities, this shojo series centers on Hana Ichise, a quietly determined eighteen-year-old who has long stood in her gifted twin sister's shadow. When she discovers her own hidden powers and finds herself bound by an unexpected marriage contract to her family's commanding heir, her story becomes one of self-discovery and earned confidence. Fans of supernatural romance with strong world-building will find plenty to appreciate here.