Carsearin
Alternative titles: Kalsearin; 카르세아린; 초룡전기 카르세아린
Author: Kyungbae Lim (임경배)
Dramatization of the story: Jungguan Yoo (유중관)
Artist: Woomin Cha (차우민)
Its title was originally "초룡전기 카르세아린" when it was a web novel. But the author changed its name into "카르세아린" when it was published.
The first runaway dragon, Arin’s adventure in the human world!!! In the Larteard Mountains, a huge mountainous region occupying the center of the continent, lived the Red Dragon Clan, the dirtiest of dragons… A 300-year old child (?), who yearned for the adventure of the human warrior, turned into a human being using the only form-conversion magic, “Polymorph,” to secretly run away from home. Instead of being a warrior, Arin is chased by orcs, sold as a slave, and became a princess. Here he (otokonoko; trap) begins a tough adventure with a human body!
English comic books
https://mangakakalot.com/manga/gc923951
Korean novels
https://1fichier.com/?wj4aafeijarje31j7gvz