If I were to describe this book series it would be predictable trope city.
There are so many tropes and cliches that I could guess the plot points and nearly every situation he found himself in.
Arrogant young master
Specialmsword that only he can use
Afinity for all the elements
Dragon «blessing»
Dragon pet/ companion
Hiding true powers
All these and more where guessed and proven true quickly.
Also the very obvious set up for a harem, not even being subtle about it either.
Other than all that; it was entertaining to a degree. 4/10, will not buy the other books.