Spoiler!
Spoiler text.It is more likely that it is the final episode of the work
There is more content in the original novel after this
After he grew old and died as Grand Prince Suyang, he came to modern times and saw a changed future
Then, in Part 2, Ryu Seong-yong became my best friend who lived in the modern era before the future changed
Considering that Part 1 is finished in a hurry without even finishing it properly, it should be considered complete
It seems to have been shipped
Copy pasted from Korean website.