At the heart of a continent of eight kingdoms lies the Marronnier Kingdom. Its general, Baribara, has seven sons, each with a unique gift and serving as a knight commander. Bound by a single noble cause of heroically rescuing a princess someday, the brothers set out as goodwill ambassadors to the seven neighboring kingdoms. What encounters, trials, and destinies await them in these unknown lands?

Chilly finds himself drawn to Bruno, unaware that it is Princess Brunhild disguised as a man. But after learning of a string of mysterious incidents surrounding her, he begins to suspect someone is working against her. He decides to uncover the truth when something strange occurs within him. Meanwhile, Insomniac is selected as the first goodwill ambassador, and his future fiancée is to be chosen.