Summary: takes place in a world where the ruler of the kingdom has dragon blood and thus has a fated mate called a “regas”. The MC is the regas to the ml but dies before either can realize that. The ml grows up and the MC is reincarnated into a younger and beautiful boy; the MC now has a mission to find the ml (prince) but he doesn’t know that the ml is now a bloodthirsty killer. The ml also doesn’t know that the MC is reincarnated.

Is this good? What's the plot