Uto Ddraig was a young man who worked as a chore at the advanced guild ``Black Thunder''. He is blamed for the failure of a mission given to him by a nobleman and is fired from the guild. All that remained in Yuuto's possession was the egg of the monster rock lizard, which the guild master forced him to use as a replacement for the cut-off money... However, what hatched from that egg was not a rock lizard, but a legendary dragon! ? The long-awaited comic version of the buddy fantasy where a good-natured young man and the strongest chibi dragon rise up!