Today we have Centaur No Nayami, an interest recent manga about a centaur girl and her friends daily life. It's very cute and and -mostly- fanservice free. Highly reccoemnded and this is coming from someone who normally hates centaurs. In particular the explanation for why Monster People exist in chapter 5.5 is really well done. Read here: http://mangafox.me/manga/centaur_no_nayami/