I Became as a Dragon Tamer After Dragon Extinction

The Awakening Ceremony lit up and I got the rarest class in history: SSS-Rank Dragon Tamer. Only one problem: dragons died out over a century ago. Everyone calls me useless until I unlocked the Dragon Egg Tracker System and entered the mysterious hundred-floor tower. Now, in a world that says dragons are gone forever, I’m on a quest to find the last eggs and prove that the most pointless class might just save us all. What destiny awaits the last Dragon Tamer?