Hiiro no Kakera
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Not currently streaming in UK.
Believing she is to live with her grandmother because her parents are transferred abroad, Tamaki Kasuga travels to the town of Kifumura. There, she is told that she is actually to perform the role of sealing the sword Onikirimaru as the next 'Tamayori princess'. To protect her, she is also assigned young men from another family as guardians.