It's very clear that the story is heavily influenced by China's history, culture, mythology, and religion, which have a strong belief in dragons.
Both Japan and China showcase their respective cultures.
The story is quite brutal due to its unknown scope to the rest of the world, where handsome and beautiful characters are killed by the author, leaving only their skeletons.
On the other hand, up until episode 13, the main character "Lu Mingfei" is still unclear about who he really is. What is clear is that if he's not in a threatening situation, he appears stupid and a true coward. Especially in scenes where he screams, intended to be comedic but instead feels cringe, similar to "Kazama Kenji" from the comedy anime D-FRAG.
Even though "Lu Mingzu" says that he consciously makes himself look stupid, it's still somewhat annoying to watch.
Moreover, I also don't know who "Lu Mingzu" really is. He mentioned a demon contract but his eyes are yellow like a dragon. The headmaster is also suspicious, clearly knowing Lu Mingzu, which seems to be the main reason he invited Lu Mingfei to the academy.
The climax in the last two episodes has amazing animation, as good as Japanese anime.
I really like the character Zero/Rin. She's emotionless, cute, blonde, with bright blue pupils, not too tall or short, and has a medium build. Basically, she's totally my type.
I hope there will be a season 2 and some fanservice episodes; I want to see Rin in a bikini or bloomer.