Is this based of the RE:Monster novel by Kanekiru Kogitsune? If not you should read it. It's also has a manga. Re:Monster manga summary: Omokui Kanata has been re-incarnated in the weakest goblin, named Rou, after having undergone an unfortunate death. However goblin Rou has retained his previous life's memories, an unusual evolution, as well as becoming strong enough to gain status boosts from eating. In this alternate world of survival of the fittest, events unfold with competent subordinates and comrades, delightful case of the tail-wagging dog - long-awaited survival fantasy by Komikaraizu ! Link: <a href="http://www.mangahere.co/manga/re_monster/" rel="nofollow">http://www.mangahere.co/manga/re_monster/</a>
