ผมนี่แหละคือผู้เลี้ยงดูเทพมังกรโบราณ

In a world of universal class changes, the world-ending evil god descends on Blue Star, threatening to enslave all life. Humanity gains the ability to change classes into various professions to fight back. Dragon Tamer, once the strongest profession, became worthless after dragons went extinct on Blue Star.Andy Sanford becomes a Dragon Tamer and obtains the Divine Dragon System, allowing him to summon ancient true dragons—creatures of unimaginable power. The so-called “dragons” in this world are merely lesser drakes, degraded beasts with only a fraction of true dragon bloodline.