My Wife Is the Ancestral Dragon

In the tenth year since Jiangbo Village was founded, sixteen-year-old Mihawi, who had arrived in the world of Monster Hunter, officially graduated from the training school after passing the hunter exam. He became a hunter admired by the villagers.

With the goal of making Jiangbo Village prosper, Mihawi kept striving to grow stronger. But after one unexpected accident, he found himself gazing at a rather familiar girl in a mysterious, pure white world, and already knew his future would probably be anything but peaceful.

Just as Mihawi had expected, all sorts of things began happening to him: a mysterious young Elder Dragon who called him Father, the unexpected awakening of Elder Dragon powers, and a pair of twins from Pokke Village...

P.S. The early chapters are rather casual in style. The main plot probably gets underway around the time he reaches Pokke Village.