Kalsarin

Kalsarin is a Manga/Manhwa/Manhua in (English/Raw) language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.com fastest updating comic site. The Summary is

The first runaway dragon Arin's danger-filled human adventure story!!! In the huge mountain range of Laruteahd, lived the most vicious of all dragons, the clan of the Red Dragons... A 300-year-old young(?) hatchling who longed for adventure, Red Dragon 'Kalsarin' used the only magic he knew, "Polymorph" to transform into a human and run away from home. Arin who became human, in dreams of becoming the adventurer he had hoped for, instead gets chased by orcs and was sold off as a slave. Then somehow, he ends up becoming a princess, and starts off his rough adventures as a human being!