If you ever saw "Puella Magi Madoka Magica" anime (or at least heard of it), then you certainly remember one little creature who loves making contracts with little girls. So, let's listen to parody song about our dear Incubator. ／人◕ ‿‿ ◕人＼ WARNING: spoilers ahead!
It's parody song but very well done. My favorite part is "We cried and cried ;_; Except I wasn't crying. ^^ ". Actually, the whole song is amazing! When I first heard it, I played it non-stop. It fits Kyuubey very well. Actually, the song reveals all the truth about him. Kyuubey isn't evil. It's just that he doesn't have emotions and doesn't understand them. You know it's kinda similar to Holy Grail Wars from Fate/Zero, Fate/Stay Night and other Fate installments. If it weren't for Incubators people still would be living in caves. Kiritsugu (from Fate/Zero) wants to make world a peaceful place where nobody will have to cry. Similar to Madoka isn't he? That's to be expected from Gen Urobuchi. ;)