Carnelian: the Sille Dragon Odyssey

Julitan is a cook who's never left his tiny fishing village. That is until one day, when he slices open the belly of a giant fish and finds a mysterious lady sleeping inside, cradling a giant sword. Julitan bestows her with the name Carnelian, only to accidentally awaken a powerful "sille" being. But Carnelian the sille soon discovers her new tamer and master Sir Julitan is no match for her superior power. Now the two must embark on a long quest to find this fierce sille dragon's true knight!

(Source: Tapas)