hmm, it seems the story was too rushed /too short . Somehow from what i saw, the author does not developing of other female characters besides Popa. If comparing to Sora no Otoshimono (series), the female characters were more shown of their development of both their feelings and their character through the story progresses.
Given, the comedy and author art still maintained its appearance and quality, the story needs to be extended and fixed. I mean why should Minotaur became an additional chapter character to the story with Monster-san ? while he should be just a sideline comedy character yet he was included in short way and paired with kerubiel?! I just don't like that ending at all. I say Monster-san should be with kerubiel instead. Rather than Popa,the person who just wasted on how many food during the summer beach and keep demanding to be eaten over and over again.