Iris, the "Wise Princess Who Never Smiles," had her memories of her reincarnation come back to her. She discovers that Fiona, a princess of a neighboring kingdom, is her from a former life, and that she is in danger due to Prince Alvin's betrayal.
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Iris goes to the neighboring country as the princess's educator to save Fiona, but an obstacle stands in her way in the form of a cool-headed prince who has no sense of tact. So unfolds the love between a wise princess who never smiles and a cool-headed prince.
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(Source: TOKYOPOP)

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