The teenage drama and NSFW scenes ruined it for me. The dragon bonding signet manifesting thing was pretty cool and I actually liked the idea, the problem, for me, was in the execution.
It looks like the book of a beginner. The characters have exaggerated traits, the plots seems forced and predictable, the "magic system" is poorly constructed, the "genius" characters and riddles they have to solve are too simple, …
World building, character development, backstory, everything is perfect. My single complaint is the lead up to the climax of the book is reeeeaallyy long
The adventure plot is kept at the background and I felt like no part of the story was the main focus and everything seemed a bit disconnected and confusing.
It starts off a little slow, but picks up the pace and keeps you entertained through the entire book. I really enjoyed how the political plays are portrayed.