I agree with you too!!!
Maybe he think that's the only way to get back to the Royal family since he lived but his love one died, he must think to get back by doing the same thing tho the fiancee
ooh that makes sense!
I think so too :"< their hair is the same too, and the thing with the ringss :"< too OP for such a side character to be
But the dark magician said that no one can fight against the demon now and showed the lover of the concubine. I think he was killed when he was fighting against the demon. And also about the ring, I think he already knew about the demon since he added defensive spell for the princess to use.
what if the villain is actually the concubine's lover? since he's a mage, he could have fallen to the dark side and resort to black magic. but hmm... if this is the case, i don't really know why he would harm the female lead.