Forbidden love in Avalon

Proto Arthur x Proto Merlin Arthur a young boy who dream of becoming a knight met a very beautiful girl in a field of flowers. Captivated by her beautiful, Arthur tried to approach her but soon he heard his brother calling him and the girl disappeared. Many years later when he drew a sword stuck in a stone he found the same girl again, who became his teacher. Years pass by, Arthur was trained by her to be a King, during those years Arthur gradually falls in love with her but was never able to tell her so he decided to do what she wanted him to do, become, a king that protect his people and land. Arthur soon gather a strong force to fight again his uncle and took back what was rightfully his, the throne of Camelot.