In a world full of magic, Lynn, who got isekai-ed, obtained the cheat – the Dragon Ranch. Lynn relied on the power obtained by raising dragons, so I started to raise dragons diligently. Fire Dragon, Earth Dragon, Ice Dragon, Steel Dragon… Dark Dragon, Bright Dragon. many years later to enter the Holy Iris Academy to learn magic. He wanted to hide his strength and develop wretchedly, but he always encountered all kinds of difficulties and had to show his amazing ability. Accept as a direct disciple, become an unparalleled powerhouse, and find the truth of this world…