Silent Witch - Chinmoku no Majo no Kakushigoto

Synopsis:

Monica Everett, known as the Silent Witch, is the world’s only mage skilled in unchanted magic. But behind her incredible talent lies a secret she mastered silent magecraft simply because of her overwhelming shyness. Until now, Monica has been content living quietly in the mountains. That changes when a surprise visit from a colleague assigns her a daunting mission: to infiltrate an academy and protect the second prince from imminent danger. Now, the world’s shyest mage must face her fears and rise to the challenge.