Nise Seiken Monogatari - Osananajimi no Seijo o Uttara Michizure ni Sareta

My childhood friend, Magary, was chosen to be the saint. From here on out, she'll have to maintain a smile at all times while at the royal capital and take lessons in etiquette and dance. She'll be living in an excruciatingly stifling world. Having been together since birth, there was naturally one thought in my mind.