Under the Glass Moon (유리달 아래서) is a korean mahnwa series by Ya Seong Ko.
Synopsis[]
Luka and Leul are two brothers and highly renowned wizards living in London. Leul, a kind-hearted, shy, blond, who is in love with their neighbor Nell, but unfortunately she has desperately fallen for his brother. Luka on the other hand is a playboy with a beautiful face and a self centered attitude. So when a young blue eyed boy, Neo arrives one day wishing to be Luka’s apprentice, he is quick to turn him away, until he discovers the boy as the power to control spirits. With such a power Luka decides he must keep Neo at all costs by fighting off all those who try to take him away, but in the end perhaps it will be Neo who will steal something precious from Luka, like a piece of the heart, they never knew he had.