そのトカゲ、実は最強の黒龍王!

A mighty dragon king slays a god but is betrayed by his ally. Fleeing as a soul, he is reborn inside an egg and summoned into a tiny, weak lizard form. He is then bonded to a young girl who makes him swallow a necklace. When his enemies come for him, will he be able to turn the tide and slay them all again?