Review Detail of MidnightMK in The Revenant King of Rubrum

is there any romance ? or is it harem?

This indeed has romance, but I do not focus on it. For harem, I am not sure. But mc will not have more than two to three love interests.

have u decided, if this is gonna be harem or not?

Yes. MC will have two or three wives, which is kind of normal for the world he lives in. And those love interests will have justified reasons for having the.. But i will not be making big harems.