If you're looking for manga similar to Sorcerous Stabber Orphen (Light Novel), you might like these titles.
In the world, there are those who hunt down rare and powerful items known as Lost Precious, including Ryuuji Kisaragi’s own parents and cousin Eriko, who’s been studying abroad for the last few years. But when Eriko suddenly returns, the boy finds himself in the middle of the action when she drags him along to intercept a special treasure from the nefarious Fang organization. What’s more, the duo soon discovers that this Lost Precious isn’t a jewel or trinket, it’s a rare dragon girl who instantly bonds with Ryuuji! Now, Ryuuji and Eriko must help teach this dragon - who they name Rose - about the world, while keeping her safe and meeting other new friends and dragons along the way.
After living a long life as the strongest and oldest dragon, he is slain by a human hero. He awakes to find himself reborn as a human, Dolan, in a remote village. He works hard as a farmer and sometimes hunts for food. His life is simple in this small village, but he is surrounded by love. He soon finds happiness he'd never experienced in his life as a dragon. However, dangerous monsters are lurking around his village lately and he goes to the woods to investigate when he finds out an army of monsters are heading his way...