So Ra No Wo To

Kanata is a rookie soldier and trumpeter on her first posting to a city called Sezu. She arrives to Sezu on a festival day, honoring the actions of legendary maidens who defeated a demon in defense of the city. She has some free time to enjoy the festival before meeting with her new superior, which gives her plenty of opportunity to get into trouble! Will the rookie Kanata be able to become a respectable and capable soldier and trumpeter?

(Source: MangaHelpers)