The reason I really like this manga, despite having very blatant harem in it, is because the women are not annoying or distracting. Rou very much loves his wives dearly and his children equally. I think it also has something to do with how the story is written itself and the way these characters 'level up'. It's nice and refreshing and while Rou's morals are very much different from what is considered the norm (anywhere), he is steady-fast and keeps to his morals. I love a levelheaded, op character that continues to grow as the story progresses.
Re:Monster