Liu Yang is a young mage who managed to awaken his powers later. Because of this, he was considered trash by others who woke up earlier. On the day of the awakening of his powers, he summoned a beautiful girl who became his partner.
She was beautiful and powerful, all she did was a hundred times as much as he did, but to her, everything he did was the most amazing thing in the world. She didn't have a name, so Liu Yang gave her that name, Liu Xia.
Liu Xia became his master and taught all the principles of magic to Liu Yang, all he needed to know, she taught. And the most important thing in training was her most important principle.
Her principle was: Be frugal when using magic.
Because of this, Liu Yang has always used the least amount of magic power possible when casting his spells.
Always using this principle in his training and life, Liu Yang has been nicknamed the Frugal Mage.