Kekkaishi no Ichirinka

In a world once safeguarded by five mystical crystal pillars, eighteen-year-old Hana Ichise has always found herself overshadowed by her talented twin sister, Hazuki. Born into a family tasked with protecting these ancient structures through supernatural means, Hana has long struggled with her own identity and abilities. When she unexpectedly discovers her own latent powers, she chooses to keep them hidden, yearning for a normal high school experience.

However, Hana's life takes an unexpected turn when Saku Ichinomiya, the confident and powerful heir to the family's main branch, becomes infatuated with her. His determination leads to a marriage contract that complicates Hana’s aspirations for independence. As she navigates her feelings for Saku and the responsibilities that come with her newfound powers, Hana must confront the expectations placed upon her and find a path that allows her to embrace both her destiny and her own desires.