I was doing a cosplay at a comic convention when I unexpectedly ended up in Teyvat.

What's even more unexpected is that he turned into the son of the God of Fire and unexpectedly gained the power of the Fire Dragon King.

With the help of the Fire Dragon King, he directly developed the Fire Dragon Slayer Magic and eventually became the new Fire Dragon King.

However, this Fire Dragon King seems a bit unreliable.

......

This book shouldn't be too long, probably around 300,000 words, right?