I don't know the ending but thank God someone took off "tragedy" from Masca's genre tag. I was sad to think every time I read it that the story will have a sad ending. And maybe someone will die (possibly: whoever that Rell's choose at the end).
I really wish Rell will end up with the demon lord. I've loved them together since the beginning. Never like the teacher that much. Maybe because I think it's wrong to marry someone whom you raised from they were young?
But I've read teacher-student, guardian/benefactor type of story before.... so hm... maybe I'm just fond of the demon lord?
ps: I love the extra story that takes place after Rell-demon lord got married <3 I love you Kainen xoxo
Kaien will die in the end because of his love for Rel. I'm not 100% sure because I didn't read the translations form the last volume yet, but I think Rel will have his baby, but the child won't be used for those who seek Kaien's powers
So the ending is sad with a little hope for happiness. And there are 2 bonus volumes after. not sure what those 2 contain, but Evil Flowers will release those as well. Maybe it's a prequel. Hopes for it ^^.
Yes. Truly, the mangaka saved the masked guy to the end of the series for his major role. Of course, it is hard to accept that he looks the same as his evil contractor. Are they twins or share the same environmental/biological development at any time because they sure are very different characters.