The old man that is a teacher to all the girls candidates for brides-to-be.

The country of Sokan is in turmoil. Following the death of the Emperor, a power struggle over the line of succession ensues. To cement the crown prince's rule, he must find a suitable bride. And so, the hunt for a new empress begins!<br>
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Ginga is a straightforward, lively country girl who joins the competition for the emperor's hand. Her earnest innocence shocks and reinvigorates the denizens of the palace. But can one girl's optimistic spirit help to save a kingdom facing threats both from within and without?<br>
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(Source: Discotek)

Kakuuto-sensei