My Girlfriend Returned as a Dragon

Sia, Minjun's girlfriend whom he thought had died after being caught in a Gate Break, has returned as a dragon after a year. But his joy is short-lived; the more physical intimacy he shares with Sia, the more his life is in danger. Is the only way to survive and continue their love to fully wield the dragon's power? Will Minjun be able to transcend the limits of his species and protect his passionate love with Sia?