This is a Vocaloid song, sung by Gakupo/Kaito/Len as Bananice VanaN'Ice. (The version I've linked is a really good real-people cover though 8D;) Did a quick translation for some friends, just slapping it up here so they can see :) Enjoy if you're into this sort of thing, lol.

( VanaN'Ice - IMITATION BLACK )