This is the magical city of Vinos. Located on the border between the demon world and the human world, this city serves as a bulwark of humanity to repel the demons approaching from the demon world. At the center of the city is the great mage Ishtar. However, as she is retiring, the next great mage is chosen from among her 10 disciples. One of them, Gilbert, was leading a life of debauchery... Master! It's another perfect day for training! Please train with me! Master! I've had enough of this! Gilbert's self-indulgent life changes when a young girl appears and asks to be his apprentice. A fantasy of growth between a lazy master and an aspiring sorcerer begins!